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Finding the Fourth Proportional to 62,470.20, 93,705.30 and 20,917.20

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Solution

The fourth proportional to 62,470.20, 93,705.30 and 20,917.20 is: 31,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,470.20 : 93,705.30 = 20,917.20 : x
  2. Step 2: Convert to fraction form
    62,470.20/93,705.30 = 20,917.20/x
  3. Step 3: Cross multiply
    62,470.20x = 93,705.30 × 20,917.20
  4. Step 4: Simplify right side
    62,470.20x = 1,960,052,501.16
  5. Step 5: Solve for x
    x = 1,960,052,501.16/62,470.20
  6. Step 6: Final answer
    x = 31,375.80

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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.