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Finding the Fourth Proportional to 101,679.57, 140,321.40 and 61,385.46

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Solution

The fourth proportional to 101,679.57, 140,321.40 and 61,385.46 is: 84,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,679.57 : 140,321.40 = 61,385.46 : x
  2. Step 2: Convert to fraction form
    101,679.57/140,321.40 = 61,385.46/x
  3. Step 3: Cross multiply
    101,679.57x = 140,321.40 × 61,385.46
  4. Step 4: Simplify right side
    101,679.57x = 8,613,693,686.84
  5. Step 5: Solve for x
    x = 8,613,693,686.84/101,679.57
  6. Step 6: Final answer
    x = 84,714.10

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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.