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Finding the Fourth Proportional to 78,249.60, 107,911.68 and 52,362.24

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Solution

The fourth proportional to 78,249.60, 107,911.68 and 52,362.24 is: 72,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,249.60 : 107,911.68 = 52,362.24 : x
  2. Step 2: Convert to fraction form
    78,249.60/107,911.68 = 52,362.24/x
  3. Step 3: Cross multiply
    78,249.60x = 107,911.68 × 52,362.24
  4. Step 4: Simplify right side
    78,249.60x = 5,650,497,286.96
  5. Step 5: Solve for x
    x = 5,650,497,286.96/78,249.60
  6. Step 6: Final answer
    x = 72,211.20

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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.