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Finding the Fourth Proportional to 87,013.80, 130,488.30 and 34,412.40

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Solution

The fourth proportional to 87,013.80, 130,488.30 and 34,412.40 is: 51,605.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,013.80 : 130,488.30 = 34,412.40 : x
  2. Step 2: Convert to fraction form
    87,013.80/130,488.30 = 34,412.40/x
  3. Step 3: Cross multiply
    87,013.80x = 130,488.30 × 34,412.40
  4. Step 4: Simplify right side
    87,013.80x = 4,490,415,574.92
  5. Step 5: Solve for x
    x = 4,490,415,574.92/87,013.80
  6. Step 6: Final answer
    x = 51,605.79

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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.