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Finding the Fourth Proportional to 125,930.10, 188,895.15 and 72,713.10

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Solution

The fourth proportional to 125,930.10, 188,895.15 and 72,713.10 is: 109,069.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,930.10 : 188,895.15 = 72,713.10 : x
  2. Step 2: Convert to fraction form
    125,930.10/188,895.15 = 72,713.10/x
  3. Step 3: Cross multiply
    125,930.10x = 188,895.15 × 72,713.10
  4. Step 4: Simplify right side
    125,930.10x = 13,735,151,931.47
  5. Step 5: Solve for x
    x = 13,735,151,931.47/125,930.10
  6. Step 6: Final answer
    x = 109,069.65

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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.