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Finding the Fourth Proportional to 87,302.40, 130,963.20 and 31,910.40

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Solution

The fourth proportional to 87,302.40, 130,963.20 and 31,910.40 is: 47,869.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,302.40 : 130,963.20 = 31,910.40 : x
  2. Step 2: Convert to fraction form
    87,302.40/130,963.20 = 31,910.40/x
  3. Step 3: Cross multiply
    87,302.40x = 130,963.20 × 31,910.40
  4. Step 4: Simplify right side
    87,302.40x = 4,179,088,097.28
  5. Step 5: Solve for x
    x = 4,179,088,097.28/87,302.40
  6. Step 6: Final answer
    x = 47,869.11

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1.5x scale

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.