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Finding the Fourth Proportional to 91,387.50, 126,129.36 and 53,654.46

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Solution

The fourth proportional to 91,387.50, 126,129.36 and 53,654.46 is: 74,051.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,387.50 : 126,129.36 = 53,654.46 : x
  2. Step 2: Convert to fraction form
    91,387.50/126,129.36 = 53,654.46/x
  3. Step 3: Cross multiply
    91,387.50x = 126,129.36 × 53,654.46
  4. Step 4: Simplify right side
    91,387.50x = 6,767,402,700.95
  5. Step 5: Solve for x
    x = 6,767,402,700.95/91,387.50
  6. Step 6: Final answer
    x = 74,051.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.