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Finding the Fourth Proportional to 87,329.80, 130,962.30 and 34,728.40

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Solution

The fourth proportional to 87,329.80, 130,962.30 and 34,728.40 is: 52,079.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,329.80 : 130,962.30 = 34,728.40 : x
  2. Step 2: Convert to fraction form
    87,329.80/130,962.30 = 34,728.40/x
  3. Step 3: Cross multiply
    87,329.80x = 130,962.30 × 34,728.40
  4. Step 4: Simplify right side
    87,329.80x = 4,548,111,139.32
  5. Step 5: Solve for x
    x = 4,548,111,139.32/87,329.80
  6. Step 6: Final answer
    x = 52,079.72

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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.