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Finding the Fourth Proportional to 154,612.80, 231,919.20 and 70,413.30

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Solution

The fourth proportional to 154,612.80, 231,919.20 and 70,413.30 is: 105,619.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,612.80 : 231,919.20 = 70,413.30 : x
  2. Step 2: Convert to fraction form
    154,612.80/231,919.20 = 70,413.30/x
  3. Step 3: Cross multiply
    154,612.80x = 231,919.20 × 70,413.30
  4. Step 4: Simplify right side
    154,612.80x = 16,330,196,205.36
  5. Step 5: Solve for x
    x = 16,330,196,205.36/154,612.80
  6. Step 6: Final answer
    x = 105,619.95

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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.