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Finding the Fourth Proportional to 94,142.40, 141,890.40 and 81,151.68

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Solution

The fourth proportional to 94,142.40, 141,890.40 and 81,151.68 is: 122,310.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,142.40 : 141,890.40 = 81,151.68 : x
  2. Step 2: Convert to fraction form
    94,142.40/141,890.40 = 81,151.68/x
  3. Step 3: Cross multiply
    94,142.40x = 141,890.40 × 81,151.68
  4. Step 4: Simplify right side
    94,142.40x = 11,514,644,335.87
  5. Step 5: Solve for x
    x = 11,514,644,335.87/94,142.40
  6. Step 6: Final answer
    x = 122,310.93

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.