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Finding the Fourth Proportional to 87,220.60, 130,831.40 and 31,062.90

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Solution

The fourth proportional to 87,220.60, 130,831.40 and 31,062.90 is: 46,594.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,220.60 : 130,831.40 = 31,062.90 : x
  2. Step 2: Convert to fraction form
    87,220.60/130,831.40 = 31,062.90/x
  3. Step 3: Cross multiply
    87,220.60x = 130,831.40 × 31,062.90
  4. Step 4: Simplify right side
    87,220.60x = 4,064,002,695.06
  5. Step 5: Solve for x
    x = 4,064,002,695.06/87,220.60
  6. Step 6: Final answer
    x = 46,594.53

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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.