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Finding the Fourth Proportional to 87,316.70, 131,032.65 and 31,912.70

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Solution

The fourth proportional to 87,316.70, 131,032.65 and 31,912.70 is: 47,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,316.70 : 131,032.65 = 31,912.70 : x
  2. Step 2: Convert to fraction form
    87,316.70/131,032.65 = 31,912.70/x
  3. Step 3: Cross multiply
    87,316.70x = 131,032.65 × 31,912.70
  4. Step 4: Simplify right side
    87,316.70x = 4,181,605,649.66
  5. Step 5: Solve for x
    x = 4,181,605,649.66/87,316.70
  6. Step 6: Final answer
    x = 47,890.10

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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.