Home / 280,129,007.10-420,193,510.65-86,040,110.90

Finding the Fourth Proportional to 280,129,007.10, 420,193,510.65 and 86,040,110.90

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Solution

The fourth proportional to 280,129,007.10, 420,193,510.65 and 86,040,110.90 is: 129,060,166.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,129,007.10 : 420,193,510.65 = 86,040,110.90 : x
  2. Step 2: Convert to fraction form
    280,129,007.10/420,193,510.65 = 86,040,110.90/x
  3. Step 3: Cross multiply
    280,129,007.10x = 420,193,510.65 × 86,040,110.90
  4. Step 4: Simplify right side
    280,129,007.10x = 36,153,496,253,685,360
  5. Step 5: Solve for x
    x = 36,153,496,253,685,360/280,129,007.10
  6. Step 6: Final answer
    x = 129,060,166.34

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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.