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Finding the Fourth Proportional to 121,358.80, 182,256.90 and 117,422.20

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Solution

The fourth proportional to 121,358.80, 182,256.90 and 117,422.20 is: 176,344.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,358.80 : 182,256.90 = 117,422.20 : x
  2. Step 2: Convert to fraction form
    121,358.80/182,256.90 = 117,422.20/x
  3. Step 3: Cross multiply
    121,358.80x = 182,256.90 × 117,422.20
  4. Step 4: Simplify right side
    121,358.80x = 21,401,006,163.18
  5. Step 5: Solve for x
    x = 21,401,006,163.18/121,358.80
  6. Step 6: Final answer
    x = 176,344.91

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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.