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Finding the Fourth Proportional to 156,903.52, 216,520.50 and 85,281.88

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Solution

The fourth proportional to 156,903.52, 216,520.50 and 85,281.88 is: 117,685.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,903.52 : 216,520.50 = 85,281.88 : x
  2. Step 2: Convert to fraction form
    156,903.52/216,520.50 = 85,281.88/x
  3. Step 3: Cross multiply
    156,903.52x = 216,520.50 × 85,281.88
  4. Step 4: Simplify right side
    156,903.52x = 18,465,275,298.54
  5. Step 5: Solve for x
    x = 18,465,275,298.54/156,903.52
  6. Step 6: Final answer
    x = 117,685.54

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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.