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Finding the Fourth Proportional to 87,000.70, 130,513.20 and 37,080.40

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Solution

The fourth proportional to 87,000.70, 130,513.20 and 37,080.40 is: 55,625.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,000.70 : 130,513.20 = 37,080.40 : x
  2. Step 2: Convert to fraction form
    87,000.70/130,513.20 = 37,080.40/x
  3. Step 3: Cross multiply
    87,000.70x = 130,513.20 × 37,080.40
  4. Step 4: Simplify right side
    87,000.70x = 4,839,481,661.28
  5. Step 5: Solve for x
    x = 4,839,481,661.28/87,000.70
  6. Step 6: Final answer
    x = 55,625.78

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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.