Home / 156,931.20-216,540-103,237.92

Finding the Fourth Proportional to 156,931.20, 216,540 and 103,237.92

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Solution

The fourth proportional to 156,931.20, 216,540 and 103,237.92 is: 142,451.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.20 : 216,540 = 103,237.92 : x
  2. Step 2: Convert to fraction form
    156,931.20/216,540 = 103,237.92/x
  3. Step 3: Cross multiply
    156,931.20x = 216,540 × 103,237.92
  4. Step 4: Simplify right side
    156,931.20x = 22,355,139,196.80
  5. Step 5: Solve for x
    x = 22,355,139,196.80/156,931.20
  6. Step 6: Final answer
    x = 142,451.85

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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.