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Finding the Fourth Proportional to 84,872.62, 117,129.36 and 47,146.78

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Solution

The fourth proportional to 84,872.62, 117,129.36 and 47,146.78 is: 65,065.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,872.62 : 117,129.36 = 47,146.78 : x
  2. Step 2: Convert to fraction form
    84,872.62/117,129.36 = 47,146.78/x
  3. Step 3: Cross multiply
    84,872.62x = 117,129.36 × 47,146.78
  4. Step 4: Simplify right side
    84,872.62x = 5,522,272,167.46
  5. Step 5: Solve for x
    x = 5,522,272,167.46/84,872.62
  6. Step 6: Final answer
    x = 65,065.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.