Home / 56,731.28-78,289.14-31,586.72

Finding the Fourth Proportional to 56,731.28, 78,289.14 and 31,586.72

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Solution

The fourth proportional to 56,731.28, 78,289.14 and 31,586.72 is: 43,589.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,731.28 : 78,289.14 = 31,586.72 : x
  2. Step 2: Convert to fraction form
    56,731.28/78,289.14 = 31,586.72/x
  3. Step 3: Cross multiply
    56,731.28x = 78,289.14 × 31,586.72
  4. Step 4: Simplify right side
    56,731.28x = 2,472,897,144.22
  5. Step 5: Solve for x
    x = 2,472,897,144.22/56,731.28
  6. Step 6: Final answer
    x = 43,589.66

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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.