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Finding the Fourth Proportional to 259,985.72, 389,978.70 and 93,773.72

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Solution

The fourth proportional to 259,985.72, 389,978.70 and 93,773.72 is: 140,660.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,985.72 : 389,978.70 = 93,773.72 : x
  2. Step 2: Convert to fraction form
    259,985.72/389,978.70 = 93,773.72/x
  3. Step 3: Cross multiply
    259,985.72x = 389,978.70 × 93,773.72
  4. Step 4: Simplify right side
    259,985.72x = 36,569,753,419.76
  5. Step 5: Solve for x
    x = 36,569,753,419.76/259,985.72
  6. Step 6: Final answer
    x = 140,660.62

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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.