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Finding the Fourth Proportional to 99,645,364.80, 149,468,047.20 and 79,489,972.80

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Solution

The fourth proportional to 99,645,364.80, 149,468,047.20 and 79,489,972.80 is: 119,234,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,645,364.80 : 149,468,047.20 = 79,489,972.80 : x
  2. Step 2: Convert to fraction form
    99,645,364.80/149,468,047.20 = 79,489,972.80/x
  3. Step 3: Cross multiply
    99,645,364.80x = 149,468,047.20 × 79,489,972.80
  4. Step 4: Simplify right side
    99,645,364.80x = 11,881,211,006,397,114
  5. Step 5: Solve for x
    x = 11,881,211,006,397,114/99,645,364.80
  6. Step 6: Final answer
    x = 119,234,959.20

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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.