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Finding the Fourth Proportional to 87,130.20, 130,695.30 and 34,512.60

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Solution

The fourth proportional to 87,130.20, 130,695.30 and 34,512.60 is: 51,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,130.20 : 130,695.30 = 34,512.60 : x
  2. Step 2: Convert to fraction form
    87,130.20/130,695.30 = 34,512.60/x
  3. Step 3: Cross multiply
    87,130.20x = 130,695.30 × 34,512.60
  4. Step 4: Simplify right side
    87,130.20x = 4,510,634,610.78
  5. Step 5: Solve for x
    x = 4,510,634,610.78/87,130.20
  6. Step 6: Final answer
    x = 51,768.90

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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.