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Finding the Fourth Proportional to 78,919.20, 118,373.40 and 25,610.40

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Solution

The fourth proportional to 78,919.20, 118,373.40 and 25,610.40 is: 38,413.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,919.20 : 118,373.40 = 25,610.40 : x
  2. Step 2: Convert to fraction form
    78,919.20/118,373.40 = 25,610.40/x
  3. Step 3: Cross multiply
    78,919.20x = 118,373.40 × 25,610.40
  4. Step 4: Simplify right side
    78,919.20x = 3,031,590,123.36
  5. Step 5: Solve for x
    x = 3,031,590,123.36/78,919.20
  6. Step 6: Final answer
    x = 38,413.85

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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.