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Finding the Fourth Proportional to 87,870.40, 131,805.60 and 83,569.60

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Solution

The fourth proportional to 87,870.40, 131,805.60 and 83,569.60 is: 125,354.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,870.40 : 131,805.60 = 83,569.60 : x
  2. Step 2: Convert to fraction form
    87,870.40/131,805.60 = 83,569.60/x
  3. Step 3: Cross multiply
    87,870.40x = 131,805.60 × 83,569.60
  4. Step 4: Simplify right side
    87,870.40x = 11,014,941,269.76
  5. Step 5: Solve for x
    x = 11,014,941,269.76/87,870.40
  6. Step 6: Final answer
    x = 125,354.40

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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.