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Finding the Fourth Proportional to 125,928.10, 188,892.15 and 72,711.10

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Solution

The fourth proportional to 125,928.10, 188,892.15 and 72,711.10 is: 109,066.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,928.10 : 188,892.15 = 72,711.10 : x
  2. Step 2: Convert to fraction form
    125,928.10/188,892.15 = 72,711.10/x
  3. Step 3: Cross multiply
    125,928.10x = 188,892.15 × 72,711.10
  4. Step 4: Simplify right side
    125,928.10x = 13,734,556,007.87
  5. Step 5: Solve for x
    x = 13,734,556,007.87/125,928.10
  6. Step 6: Final answer
    x = 109,066.65

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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.