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Finding the Fourth Proportional to 121,423.80, 182,135.70 and 116,758.20

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Solution

The fourth proportional to 121,423.80, 182,135.70 and 116,758.20 is: 175,137.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,423.80 : 182,135.70 = 116,758.20 : x
  2. Step 2: Convert to fraction form
    121,423.80/182,135.70 = 116,758.20/x
  3. Step 3: Cross multiply
    121,423.80x = 182,135.70 × 116,758.20
  4. Step 4: Simplify right side
    121,423.80x = 21,265,836,487.74
  5. Step 5: Solve for x
    x = 21,265,836,487.74/121,423.80
  6. Step 6: Final answer
    x = 175,137.30

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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.