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Finding the Fourth Proportional to 87,080.74, 130,534.99 and 42,018.97

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Solution

The fourth proportional to 87,080.74, 130,534.99 and 42,018.97 is: 62,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,080.74 : 130,534.99 = 42,018.97 : x
  2. Step 2: Convert to fraction form
    87,080.74/130,534.99 = 42,018.97/x
  3. Step 3: Cross multiply
    87,080.74x = 130,534.99 × 42,018.97
  4. Step 4: Simplify right side
    87,080.74x = 5,484,945,878.49
  5. Step 5: Solve for x
    x = 5,484,945,878.49/87,080.74
  6. Step 6: Final answer
    x = 62,986.90

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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.