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Finding the Fourth Proportional to 78,919.70, 118,374.15 and 25,610.90

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Solution

The fourth proportional to 78,919.70, 118,374.15 and 25,610.90 is: 38,414.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,919.70 : 118,374.15 = 25,610.90 : x
  2. Step 2: Convert to fraction form
    78,919.70/118,374.15 = 25,610.90/x
  3. Step 3: Cross multiply
    78,919.70x = 118,374.15 × 25,610.90
  4. Step 4: Simplify right side
    78,919.70x = 3,031,668,518.24
  5. Step 5: Solve for x
    x = 3,031,668,518.24/78,919.70
  6. Step 6: Final answer
    x = 38,414.60

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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.