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Finding the Fourth Proportional to 118,309.20, 177,593.40 and 65,821.20

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Solution

The fourth proportional to 118,309.20, 177,593.40 and 65,821.20 is: 98,803.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,309.20 : 177,593.40 = 65,821.20 : x
  2. Step 2: Convert to fraction form
    118,309.20/177,593.40 = 65,821.20/x
  3. Step 3: Cross multiply
    118,309.20x = 177,593.40 × 65,821.20
  4. Step 4: Simplify right side
    118,309.20x = 11,689,410,700.08
  5. Step 5: Solve for x
    x = 11,689,410,700.08/118,309.20
  6. Step 6: Final answer
    x = 98,803.90

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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.