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Finding the Fourth Proportional to 101,917.60, 140,655.12 and 56,604.32

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Solution

The fourth proportional to 101,917.60, 140,655.12 and 56,604.32 is: 78,118.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,917.60 : 140,655.12 = 56,604.32 : x
  2. Step 2: Convert to fraction form
    101,917.60/140,655.12 = 56,604.32/x
  3. Step 3: Cross multiply
    101,917.60x = 140,655.12 × 56,604.32
  4. Step 4: Simplify right side
    101,917.60x = 7,961,687,422.12
  5. Step 5: Solve for x
    x = 7,961,687,422.12/101,917.60
  6. Step 6: Final answer
    x = 78,118.87

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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.