Home / 56,638.60-78,163.28-31,146.90

Finding the Fourth Proportional to 56,638.60, 78,163.28 and 31,146.90

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Solution

The fourth proportional to 56,638.60, 78,163.28 and 31,146.90 is: 42,983.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,638.60 : 78,163.28 = 31,146.90 : x
  2. Step 2: Convert to fraction form
    56,638.60/78,163.28 = 31,146.90/x
  3. Step 3: Cross multiply
    56,638.60x = 78,163.28 × 31,146.90
  4. Step 4: Simplify right side
    56,638.60x = 2,434,543,865.83
  5. Step 5: Solve for x
    x = 2,434,543,865.83/56,638.60
  6. Step 6: Final answer
    x = 42,983.83

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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.