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Finding the Fourth Proportional to 94,143.40, 141,891.91 and 81,152.68

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Solution

The fourth proportional to 94,143.40, 141,891.91 and 81,152.68 is: 122,312.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,143.40 : 141,891.91 = 81,152.68 : x
  2. Step 2: Convert to fraction form
    94,143.40/141,891.91 = 81,152.68/x
  3. Step 3: Cross multiply
    94,143.40x = 141,891.91 × 81,152.68
  4. Step 4: Simplify right side
    94,143.40x = 11,514,908,766.82
  5. Step 5: Solve for x
    x = 11,514,908,766.82/94,143.40
  6. Step 6: Final answer
    x = 122,312.44

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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.