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Finding the Fourth Proportional to 86,963.80, 130,542.90 and 67,329.40

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Solution

The fourth proportional to 86,963.80, 130,542.90 and 67,329.40 is: 101,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,963.80 : 130,542.90 = 67,329.40 : x
  2. Step 2: Convert to fraction form
    86,963.80/130,542.90 = 67,329.40/x
  3. Step 3: Cross multiply
    86,963.80x = 130,542.90 × 67,329.40
  4. Step 4: Simplify right side
    86,963.80x = 8,789,375,131.26
  5. Step 5: Solve for x
    x = 8,789,375,131.26/86,963.80
  6. Step 6: Final answer
    x = 101,069.35

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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.