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Finding the Fourth Proportional to 112,521.20, 168,676.20 and 42,447.60

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Solution

The fourth proportional to 112,521.20, 168,676.20 and 42,447.60 is: 63,631.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,521.20 : 168,676.20 = 42,447.60 : x
  2. Step 2: Convert to fraction form
    112,521.20/168,676.20 = 42,447.60/x
  3. Step 3: Cross multiply
    112,521.20x = 168,676.20 × 42,447.60
  4. Step 4: Simplify right side
    112,521.20x = 7,159,899,867.12
  5. Step 5: Solve for x
    x = 7,159,899,867.12/112,521.20
  6. Step 6: Final answer
    x = 63,631.56

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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.