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Finding the Fourth Proportional to 87,301.40, 130,865.70 and 42,891.80

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Solution

The fourth proportional to 87,301.40, 130,865.70 and 42,891.80 is: 64,295.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,301.40 : 130,865.70 = 42,891.80 : x
  2. Step 2: Convert to fraction form
    87,301.40/130,865.70 = 42,891.80/x
  3. Step 3: Cross multiply
    87,301.40x = 130,865.70 × 42,891.80
  4. Step 4: Simplify right side
    87,301.40x = 5,613,065,431.26
  5. Step 5: Solve for x
    x = 5,613,065,431.26/87,301.40
  6. Step 6: Final answer
    x = 64,295.25

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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.