Home / 57,138.24-78,854.40-31,989.12

Finding the Fourth Proportional to 57,138.24, 78,854.40 and 31,989.12

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Solution

The fourth proportional to 57,138.24, 78,854.40 and 31,989.12 is: 44,147.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,138.24 : 78,854.40 = 31,989.12 : x
  2. Step 2: Convert to fraction form
    57,138.24/78,854.40 = 31,989.12/x
  3. Step 3: Cross multiply
    57,138.24x = 78,854.40 × 31,989.12
  4. Step 4: Simplify right side
    57,138.24x = 2,522,482,864.13
  5. Step 5: Solve for x
    x = 2,522,482,864.13/57,138.24
  6. Step 6: Final answer
    x = 44,147.02

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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.