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Finding the Fourth Proportional to 218,795.04, 327,995.60 and 78,520.86

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Solution

The fourth proportional to 218,795.04, 327,995.60 and 78,520.86 is: 117,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,795.04 : 327,995.60 = 78,520.86 : x
  2. Step 2: Convert to fraction form
    218,795.04/327,995.60 = 78,520.86/x
  3. Step 3: Cross multiply
    218,795.04x = 327,995.60 × 78,520.86
  4. Step 4: Simplify right side
    218,795.04x = 25,754,496,195.61
  5. Step 5: Solve for x
    x = 25,754,496,195.61/218,795.04
  6. Step 6: Final answer
    x = 117,710.60

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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.