Home / 120,557.16-180,815.10-31,811.60

Finding the Fourth Proportional to 120,557.16, 180,815.10 and 31,811.60

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Solution

The fourth proportional to 120,557.16, 180,815.10 and 31,811.60 is: 47,711.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,557.16 : 180,815.10 = 31,811.60 : x
  2. Step 2: Convert to fraction form
    120,557.16/180,815.10 = 31,811.60/x
  3. Step 3: Cross multiply
    120,557.16x = 180,815.10 × 31,811.60
  4. Step 4: Simplify right side
    120,557.16x = 5,752,017,635.16
  5. Step 5: Solve for x
    x = 5,752,017,635.16/120,557.16
  6. Step 6: Final answer
    x = 47,711.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.