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Finding the Fourth Proportional to 218,751.40, 328,086.60 and 60,947.20

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Solution

The fourth proportional to 218,751.40, 328,086.60 and 60,947.20 is: 91,409.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,751.40 : 328,086.60 = 60,947.20 : x
  2. Step 2: Convert to fraction form
    218,751.40/328,086.60 = 60,947.20/x
  3. Step 3: Cross multiply
    218,751.40x = 328,086.60 × 60,947.20
  4. Step 4: Simplify right side
    218,751.40x = 19,995,959,627.52
  5. Step 5: Solve for x
    x = 19,995,959,627.52/218,751.40
  6. Step 6: Final answer
    x = 91,409.52

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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.