Home / 129,280,439.40-193,920,659.10-80,907,498.60

Finding the Fourth Proportional to 129,280,439.40, 193,920,659.10 and 80,907,498.60

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Solution

The fourth proportional to 129,280,439.40, 193,920,659.10 and 80,907,498.60 is: 121,361,247.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,280,439.40 : 193,920,659.10 = 80,907,498.60 : x
  2. Step 2: Convert to fraction form
    129,280,439.40/193,920,659.10 = 80,907,498.60/x
  3. Step 3: Cross multiply
    129,280,439.40x = 193,920,659.10 × 80,907,498.60
  4. Step 4: Simplify right side
    129,280,439.40x = 15,689,635,454,644,326
  5. Step 5: Solve for x
    x = 15,689,635,454,644,326/129,280,439.40
  6. Step 6: Final answer
    x = 121,361,247.90

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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.