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Finding the Fourth Proportional to 87,139.70, 130,752.79 and 34,548.02

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Solution

The fourth proportional to 87,139.70, 130,752.79 and 34,548.02 is: 51,839.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,139.70 : 130,752.79 = 34,548.02 : x
  2. Step 2: Convert to fraction form
    87,139.70/130,752.79 = 34,548.02/x
  3. Step 3: Cross multiply
    87,139.70x = 130,752.79 × 34,548.02
  4. Step 4: Simplify right side
    87,139.70x = 4,517,250,003.98
  5. Step 5: Solve for x
    x = 4,517,250,003.98/87,139.70
  6. Step 6: Final answer
    x = 51,839.17

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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.