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Finding the Fourth Proportional to 99,666.30, 149,608.80 and 55,270.20

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Solution

The fourth proportional to 99,666.30, 149,608.80 and 55,270.20 is: 82,965.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,666.30 : 149,608.80 = 55,270.20 : x
  2. Step 2: Convert to fraction form
    99,666.30/149,608.80 = 55,270.20/x
  3. Step 3: Cross multiply
    99,666.30x = 149,608.80 × 55,270.20
  4. Step 4: Simplify right side
    99,666.30x = 8,268,908,297.76
  5. Step 5: Solve for x
    x = 8,268,908,297.76/99,666.30
  6. Step 6: Final answer
    x = 82,965.94

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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.