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Finding the Fourth Proportional to 108,002.60, 162,003.90 and 85,695.20

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Solution

The fourth proportional to 108,002.60, 162,003.90 and 85,695.20 is: 128,542.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,002.60 : 162,003.90 = 85,695.20 : x
  2. Step 2: Convert to fraction form
    108,002.60/162,003.90 = 85,695.20/x
  3. Step 3: Cross multiply
    108,002.60x = 162,003.90 × 85,695.20
  4. Step 4: Simplify right side
    108,002.60x = 13,882,956,611.28
  5. Step 5: Solve for x
    x = 13,882,956,611.28/108,002.60
  6. Step 6: Final answer
    x = 128,542.80

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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.