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Finding the Fourth Proportional to 99,203,998.80, 148,805,998.20 and 45,351,310.80

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Solution

The fourth proportional to 99,203,998.80, 148,805,998.20 and 45,351,310.80 is: 68,026,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,203,998.80 : 148,805,998.20 = 45,351,310.80 : x
  2. Step 2: Convert to fraction form
    99,203,998.80/148,805,998.20 = 45,351,310.80/x
  3. Step 3: Cross multiply
    99,203,998.80x = 148,805,998.20 × 45,351,310.80
  4. Step 4: Simplify right side
    99,203,998.80x = 6,748,547,073,272,440
  5. Step 5: Solve for x
    x = 6,748,547,073,272,440/99,203,998.80
  6. Step 6: Final answer
    x = 68,026,966.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.