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Finding the Fourth Proportional to 87,308.88, 130,987.50 and 34,755.28

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Solution

The fourth proportional to 87,308.88, 130,987.50 and 34,755.28 is: 52,142.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,308.88 : 130,987.50 = 34,755.28 : x
  2. Step 2: Convert to fraction form
    87,308.88/130,987.50 = 34,755.28/x
  3. Step 3: Cross multiply
    87,308.88x = 130,987.50 × 34,755.28
  4. Step 4: Simplify right side
    87,308.88x = 4,552,507,239
  5. Step 5: Solve for x
    x = 4,552,507,239/87,308.88
  6. Step 6: Final answer
    x = 52,142.55

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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.