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Finding the Fourth Proportional to 145,740.59, 218,610.89 and 56,931.82

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Solution

The fourth proportional to 145,740.59, 218,610.89 and 56,931.82 is: 85,397.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,740.59 : 218,610.89 = 56,931.82 : x
  2. Step 2: Convert to fraction form
    145,740.59/218,610.89 = 56,931.82/x
  3. Step 3: Cross multiply
    145,740.59x = 218,610.89 × 56,931.82
  4. Step 4: Simplify right side
    145,740.59x = 12,445,915,996.79
  5. Step 5: Solve for x
    x = 12,445,915,996.79/145,740.59
  6. Step 6: Final answer
    x = 85,397.73

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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.