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Finding the Fourth Proportional to 101,343.43, 139,893.36 and 90,714.61

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Solution

The fourth proportional to 101,343.43, 139,893.36 and 90,714.61 is: 125,221.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,343.43 : 139,893.36 = 90,714.61 : x
  2. Step 2: Convert to fraction form
    101,343.43/139,893.36 = 90,714.61/x
  3. Step 3: Cross multiply
    101,343.43x = 139,893.36 × 90,714.61
  4. Step 4: Simplify right side
    101,343.43x = 12,690,370,894.52
  5. Step 5: Solve for x
    x = 12,690,370,894.52/101,343.43
  6. Step 6: Final answer
    x = 125,221.45

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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.