Home / 126,429,541.20-189,644,311.80-82,780,520.40

Finding the Fourth Proportional to 126,429,541.20, 189,644,311.80 and 82,780,520.40

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Solution

The fourth proportional to 126,429,541.20, 189,644,311.80 and 82,780,520.40 is: 124,170,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,429,541.20 : 189,644,311.80 = 82,780,520.40 : x
  2. Step 2: Convert to fraction form
    126,429,541.20/189,644,311.80 = 82,780,520.40/x
  3. Step 3: Cross multiply
    126,429,541.20x = 189,644,311.80 × 82,780,520.40
  4. Step 4: Simplify right side
    126,429,541.20x = 15,698,854,821,703,862
  5. Step 5: Solve for x
    x = 15,698,854,821,703,862/126,429,541.20
  6. Step 6: Final answer
    x = 124,170,780.60

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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.