Home / 156,930.15-216,565.75-85,311.71

Finding the Fourth Proportional to 156,930.15, 216,565.75 and 85,311.71

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Solution

The fourth proportional to 156,930.15, 216,565.75 and 85,311.71 is: 117,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,930.15 : 216,565.75 = 85,311.71 : x
  2. Step 2: Convert to fraction form
    156,930.15/216,565.75 = 85,311.71/x
  3. Step 3: Cross multiply
    156,930.15x = 216,565.75 × 85,311.71
  4. Step 4: Simplify right side
    156,930.15x = 18,475,594,788.07
  5. Step 5: Solve for x
    x = 18,475,594,788.07/156,930.15
  6. Step 6: Final answer
    x = 117,731.33

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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.