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Finding the Fourth Proportional to 123,639.60, 185,653.80 and 71,151.60

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Solution

The fourth proportional to 123,639.60, 185,653.80 and 71,151.60 is: 106,839.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,639.60 : 185,653.80 = 71,151.60 : x
  2. Step 2: Convert to fraction form
    123,639.60/185,653.80 = 71,151.60/x
  3. Step 3: Cross multiply
    123,639.60x = 185,653.80 × 71,151.60
  4. Step 4: Simplify right side
    123,639.60x = 13,209,564,916.08
  5. Step 5: Solve for x
    x = 13,209,564,916.08/123,639.60
  6. Step 6: Final answer
    x = 106,839.27

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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.