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Finding the Fourth Proportional to 117,400.80, 176,144.40 and 47,287.20

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Solution

The fourth proportional to 117,400.80, 176,144.40 and 47,287.20 is: 70,948.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,400.80 : 176,144.40 = 47,287.20 : x
  2. Step 2: Convert to fraction form
    117,400.80/176,144.40 = 47,287.20/x
  3. Step 3: Cross multiply
    117,400.80x = 176,144.40 × 47,287.20
  4. Step 4: Simplify right side
    117,400.80x = 8,329,375,471.68
  5. Step 5: Solve for x
    x = 8,329,375,471.68/117,400.80
  6. Step 6: Final answer
    x = 70,948.20

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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.