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Finding the Fourth Proportional to 87,985.60, 131,978.40 and 41,329.60

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Solution

The fourth proportional to 87,985.60, 131,978.40 and 41,329.60 is: 61,994.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,985.60 : 131,978.40 = 41,329.60 : x
  2. Step 2: Convert to fraction form
    87,985.60/131,978.40 = 41,329.60/x
  3. Step 3: Cross multiply
    87,985.60x = 131,978.40 × 41,329.60
  4. Step 4: Simplify right side
    87,985.60x = 5,454,614,480.64
  5. Step 5: Solve for x
    x = 5,454,614,480.64/87,985.60
  6. Step 6: Final answer
    x = 61,994.40

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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.