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Finding the Fourth Proportional to 56,486.40, 77,939.52 and 31,330.56

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Solution

The fourth proportional to 56,486.40, 77,939.52 and 31,330.56 is: 43,229.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,486.40 : 77,939.52 = 31,330.56 : x
  2. Step 2: Convert to fraction form
    56,486.40/77,939.52 = 31,330.56/x
  3. Step 3: Cross multiply
    56,486.40x = 77,939.52 × 31,330.56
  4. Step 4: Simplify right side
    56,486.40x = 2,441,888,807.73
  5. Step 5: Solve for x
    x = 2,441,888,807.73/56,486.40
  6. Step 6: Final answer
    x = 43,229.68

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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.