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Finding the Fourth Proportional to 125,221.32, 187,772.52 and 72,646.92

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Solution

The fourth proportional to 125,221.32, 187,772.52 and 72,646.92 is: 108,935.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,221.32 : 187,772.52 = 72,646.92 : x
  2. Step 2: Convert to fraction form
    125,221.32/187,772.52 = 72,646.92/x
  3. Step 3: Cross multiply
    125,221.32x = 187,772.52 × 72,646.92
  4. Step 4: Simplify right side
    125,221.32x = 13,641,095,238.64
  5. Step 5: Solve for x
    x = 13,641,095,238.64/125,221.32
  6. Step 6: Final answer
    x = 108,935.88

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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.