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Finding the Fourth Proportional to 101,343.68, 139,893.71 and 90,714.86

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Solution

The fourth proportional to 101,343.68, 139,893.71 and 90,714.86 is: 125,221.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,343.68 : 139,893.71 = 90,714.86 : x
  2. Step 2: Convert to fraction form
    101,343.68/139,893.71 = 90,714.86/x
  3. Step 3: Cross multiply
    101,343.68x = 139,893.71 × 90,714.86
  4. Step 4: Simplify right side
    101,343.68x = 12,690,437,164.49
  5. Step 5: Solve for x
    x = 12,690,437,164.49/101,343.68
  6. Step 6: Final answer
    x = 125,221.80

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1.5x scale

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.