Home / 218,749.32-328,156.79-78,540.75

Finding the Fourth Proportional to 218,749.32, 328,156.79 and 78,540.75

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Solution

The fourth proportional to 218,749.32, 328,156.79 and 78,540.75 is: 117,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,749.32 : 328,156.79 = 78,540.75 : x
  2. Step 2: Convert to fraction form
    218,749.32/328,156.79 = 78,540.75/x
  3. Step 3: Cross multiply
    218,749.32x = 328,156.79 × 78,540.75
  4. Step 4: Simplify right side
    218,749.32x = 25,773,680,011.49
  5. Step 5: Solve for x
    x = 25,773,680,011.49/218,749.32
  6. Step 6: Final answer
    x = 117,822.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.