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Finding the Fourth Proportional to 129,862.90, 194,794.35 and 74,413.30

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Solution

The fourth proportional to 129,862.90, 194,794.35 and 74,413.30 is: 111,619.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,862.90 : 194,794.35 = 74,413.30 : x
  2. Step 2: Convert to fraction form
    129,862.90/194,794.35 = 74,413.30/x
  3. Step 3: Cross multiply
    129,862.90x = 194,794.35 × 74,413.30
  4. Step 4: Simplify right side
    129,862.90x = 14,495,290,404.86
  5. Step 5: Solve for x
    x = 14,495,290,404.86/129,862.90
  6. Step 6: Final answer
    x = 111,619.95

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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.