Home / 113,686.20-156,898.65-72,321.88

Finding the Fourth Proportional to 113,686.20, 156,898.65 and 72,321.88

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Solution

The fourth proportional to 113,686.20, 156,898.65 and 72,321.88 is: 99,811.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,686.20 : 156,898.65 = 72,321.88 : x
  2. Step 2: Convert to fraction form
    113,686.20/156,898.65 = 72,321.88/x
  3. Step 3: Cross multiply
    113,686.20x = 156,898.65 × 72,321.88
  4. Step 4: Simplify right side
    113,686.20x = 11,347,205,337.46
  5. Step 5: Solve for x
    x = 11,347,205,337.46/113,686.20
  6. Step 6: Final answer
    x = 99,811.63

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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.