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Finding the Fourth Proportional to 60,917.96, 83,989.70 and 39,371.45

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Solution

The fourth proportional to 60,917.96, 83,989.70 and 39,371.45 is: 54,282.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,917.96 : 83,989.70 = 39,371.45 : x
  2. Step 2: Convert to fraction form
    60,917.96/83,989.70 = 39,371.45/x
  3. Step 3: Cross multiply
    60,917.96x = 83,989.70 × 39,371.45
  4. Step 4: Simplify right side
    60,917.96x = 3,306,795,657.26
  5. Step 5: Solve for x
    x = 3,306,795,657.26/60,917.96
  6. Step 6: Final answer
    x = 54,282.78

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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.