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Finding the Fourth Proportional to 58,440, 80,647.20 and 31,944

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Solution

The fourth proportional to 58,440, 80,647.20 and 31,944 is: 44,082.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,440 : 80,647.20 = 31,944 : x
  2. Step 2: Convert to fraction form
    58,440/80,647.20 = 31,944/x
  3. Step 3: Cross multiply
    58,440x = 80,647.20 × 31,944
  4. Step 4: Simplify right side
    58,440x = 2,576,194,156.80
  5. Step 5: Solve for x
    x = 2,576,194,156.80/58,440
  6. Step 6: Final answer
    x = 44,082.72

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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.