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Finding the Fourth Proportional to 31,058.78, 42,865.07 and 23,123.61

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Solution

The fourth proportional to 31,058.78, 42,865.07 and 23,123.61 is: 31,913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,058.78 : 42,865.07 = 23,123.61 : x
  2. Step 2: Convert to fraction form
    31,058.78/42,865.07 = 23,123.61/x
  3. Step 3: Cross multiply
    31,058.78x = 42,865.07 × 23,123.61
  4. Step 4: Simplify right side
    31,058.78x = 991,195,045.68
  5. Step 5: Solve for x
    x = 991,195,045.68/31,058.78
  6. Step 6: Final answer
    x = 31,913.53

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.