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Finding the Fourth Proportional to 123,299.80, 170,153.72 and 66,711.17

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Solution

The fourth proportional to 123,299.80, 170,153.72 and 66,711.17 is: 92,061.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,299.80 : 170,153.72 = 66,711.17 : x
  2. Step 2: Convert to fraction form
    123,299.80/170,153.72 = 66,711.17/x
  3. Step 3: Cross multiply
    123,299.80x = 170,153.72 × 66,711.17
  4. Step 4: Simplify right side
    123,299.80x = 11,351,153,741.05
  5. Step 5: Solve for x
    x = 11,351,153,741.05/123,299.80
  6. Step 6: Final answer
    x = 92,061.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.