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Finding the Fourth Proportional to 216,778.66, 325,139.22 and 98,422.78

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Solution

The fourth proportional to 216,778.66, 325,139.22 and 98,422.78 is: 147,621.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,778.66 : 325,139.22 = 98,422.78 : x
  2. Step 2: Convert to fraction form
    216,778.66/325,139.22 = 98,422.78/x
  3. Step 3: Cross multiply
    216,778.66x = 325,139.22 × 98,422.78
  4. Step 4: Simplify right side
    216,778.66x = 32,001,105,919.43
  5. Step 5: Solve for x
    x = 32,001,105,919.43/216,778.66
  6. Step 6: Final answer
    x = 147,621.11

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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.