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Finding the Fourth Proportional to 63,990.60, 89,470.20 and 63,990.60

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Solution

The fourth proportional to 63,990.60, 89,470.20 and 63,990.60 is: 89,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,990.60 : 89,470.20 = 63,990.60 : x
  2. Step 2: Convert to fraction form
    63,990.60/89,470.20 = 63,990.60/x
  3. Step 3: Cross multiply
    63,990.60x = 89,470.20 × 63,990.60
  4. Step 4: Simplify right side
    63,990.60x = 5,725,251,780.12
  5. Step 5: Solve for x
    x = 5,725,251,780.12/63,990.60
  6. Step 6: Final answer
    x = 89,470.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.