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Finding the Fourth Proportional to 101,355.68, 139,836.60 and 65,590.88

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Solution

The fourth proportional to 101,355.68, 139,836.60 and 65,590.88 is: 90,493.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,355.68 : 139,836.60 = 65,590.88 : x
  2. Step 2: Convert to fraction form
    101,355.68/139,836.60 = 65,590.88/x
  3. Step 3: Cross multiply
    101,355.68x = 139,836.60 × 65,590.88
  4. Step 4: Simplify right side
    101,355.68x = 9,172,005,650.21
  5. Step 5: Solve for x
    x = 9,172,005,650.21/101,355.68
  6. Step 6: Final answer
    x = 90,493.26

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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.