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Finding the Fourth Proportional to 84,915.52, 117,187.68 and 47,193.28

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Solution

The fourth proportional to 84,915.52, 117,187.68 and 47,193.28 is: 65,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,915.52 : 117,187.68 = 47,193.28 : x
  2. Step 2: Convert to fraction form
    84,915.52/117,187.68 = 47,193.28/x
  3. Step 3: Cross multiply
    84,915.52x = 117,187.68 × 47,193.28
  4. Step 4: Simplify right side
    84,915.52x = 5,530,470,994.79
  5. Step 5: Solve for x
    x = 5,530,470,994.79/84,915.52
  6. Step 6: Final answer
    x = 65,129.10

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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.