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Finding the Fourth Proportional to 218,340.60, 327,312.90 and 78,066.60

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Solution

The fourth proportional to 218,340.60, 327,312.90 and 78,066.60 is: 117,029.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,340.60 : 327,312.90 = 78,066.60 : x
  2. Step 2: Convert to fraction form
    218,340.60/327,312.90 = 78,066.60/x
  3. Step 3: Cross multiply
    218,340.60x = 327,312.90 × 78,066.60
  4. Step 4: Simplify right side
    218,340.60x = 25,552,205,239.14
  5. Step 5: Solve for x
    x = 25,552,205,239.14/218,340.60
  6. Step 6: Final answer
    x = 117,029.11

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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.