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Finding the Fourth Proportional to 79,248.48, 118,978.28 and 45,992.40

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Solution

The fourth proportional to 79,248.48, 118,978.28 and 45,992.40 is: 69,049.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,248.48 : 118,978.28 = 45,992.40 : x
  2. Step 2: Convert to fraction form
    79,248.48/118,978.28 = 45,992.40/x
  3. Step 3: Cross multiply
    79,248.48x = 118,978.28 × 45,992.40
  4. Step 4: Simplify right side
    79,248.48x = 5,472,096,645.07
  5. Step 5: Solve for x
    x = 5,472,096,645.07/79,248.48
  6. Step 6: Final answer
    x = 69,049.86

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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.