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Finding the Fourth Proportional to 121,404.10, 182,106.15 and 79,413.70

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Solution

The fourth proportional to 121,404.10, 182,106.15 and 79,413.70 is: 119,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,404.10 : 182,106.15 = 79,413.70 : x
  2. Step 2: Convert to fraction form
    121,404.10/182,106.15 = 79,413.70/x
  3. Step 3: Cross multiply
    121,404.10x = 182,106.15 × 79,413.70
  4. Step 4: Simplify right side
    121,404.10x = 14,461,723,164.26
  5. Step 5: Solve for x
    x = 14,461,723,164.26/121,404.10
  6. Step 6: Final answer
    x = 119,120.55

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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.