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Finding the Fourth Proportional to 87,308.70, 131,020.65 and 31,904.70

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Solution

The fourth proportional to 87,308.70, 131,020.65 and 31,904.70 is: 47,878.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,308.70 : 131,020.65 = 31,904.70 : x
  2. Step 2: Convert to fraction form
    87,308.70/131,020.65 = 31,904.70/x
  3. Step 3: Cross multiply
    87,308.70x = 131,020.65 × 31,904.70
  4. Step 4: Simplify right side
    87,308.70x = 4,180,174,532.06
  5. Step 5: Solve for x
    x = 4,180,174,532.06/87,308.70
  6. Step 6: Final answer
    x = 47,878.10

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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.