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Finding the Fourth Proportional to 87,007.60, 130,705.80 and 83,702.80

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Solution

The fourth proportional to 87,007.60, 130,705.80 and 83,702.80 is: 125,741.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,007.60 : 130,705.80 = 83,702.80 : x
  2. Step 2: Convert to fraction form
    87,007.60/130,705.80 = 83,702.80/x
  3. Step 3: Cross multiply
    87,007.60x = 130,705.80 × 83,702.80
  4. Step 4: Simplify right side
    87,007.60x = 10,940,441,436.24
  5. Step 5: Solve for x
    x = 10,940,441,436.24/87,007.60
  6. Step 6: Final answer
    x = 125,741.22

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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.