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Finding the Fourth Proportional to 100,753.36, 139,040.80 and 57,732

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Solution

The fourth proportional to 100,753.36, 139,040.80 and 57,732 is: 79,670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,753.36 : 139,040.80 = 57,732 : x
  2. Step 2: Convert to fraction form
    100,753.36/139,040.80 = 57,732/x
  3. Step 3: Cross multiply
    100,753.36x = 139,040.80 × 57,732
  4. Step 4: Simplify right side
    100,753.36x = 8,027,103,321.27
  5. Step 5: Solve for x
    x = 8,027,103,321.27/100,753.36
  6. Step 6: Final answer
    x = 79,670.82

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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.