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Finding the Fourth Proportional to 156,862.95, 216,471.15 and 85,243.02

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Solution

The fourth proportional to 156,862.95, 216,471.15 and 85,243.02 is: 117,635.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,862.95 : 216,471.15 = 85,243.02 : x
  2. Step 2: Convert to fraction form
    156,862.95/216,471.15 = 85,243.02/x
  3. Step 3: Cross multiply
    156,862.95x = 216,471.15 × 85,243.02
  4. Step 4: Simplify right side
    156,862.95x = 18,452,654,568.87
  5. Step 5: Solve for x
    x = 18,452,654,568.87/156,862.95
  6. Step 6: Final answer
    x = 117,635.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.