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Finding the Fourth Proportional to 257,382.60, 386,125.54 and 88,909.08

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Solution

The fourth proportional to 257,382.60, 386,125.54 and 88,909.08 is: 133,381.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,382.60 : 386,125.54 = 88,909.08 : x
  2. Step 2: Convert to fraction form
    257,382.60/386,125.54 = 88,909.08/x
  3. Step 3: Cross multiply
    257,382.60x = 386,125.54 × 88,909.08
  4. Step 4: Simplify right side
    257,382.60x = 34,330,066,525.90
  5. Step 5: Solve for x
    x = 34,330,066,525.90/257,382.60
  6. Step 6: Final answer
    x = 133,381.46

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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.