Home / 278,178.90-417,320.21-126,386.61

Finding the Fourth Proportional to 278,178.90, 417,320.21 and 126,386.61

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Solution

The fourth proportional to 278,178.90, 417,320.21 and 126,386.61 is: 189,603.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,178.90 : 417,320.21 = 126,386.61 : x
  2. Step 2: Convert to fraction form
    278,178.90/417,320.21 = 126,386.61/x
  3. Step 3: Cross multiply
    278,178.90x = 417,320.21 × 126,386.61
  4. Step 4: Simplify right side
    278,178.90x = 52,743,686,626.39
  5. Step 5: Solve for x
    x = 52,743,686,626.39/278,178.90
  6. Step 6: Final answer
    x = 189,603.48

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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.