Home / 268,439.13-402,649.47-68,761.25

Finding the Fourth Proportional to 268,439.13, 402,649.47 and 68,761.25

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Solution

The fourth proportional to 268,439.13, 402,649.47 and 68,761.25 is: 103,139.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,439.13 : 402,649.47 = 68,761.25 : x
  2. Step 2: Convert to fraction form
    268,439.13/402,649.47 = 68,761.25/x
  3. Step 3: Cross multiply
    268,439.13x = 402,649.47 × 68,761.25
  4. Step 4: Simplify right side
    268,439.13x = 27,686,678,855.79
  5. Step 5: Solve for x
    x = 27,686,678,855.79/268,439.13
  6. Step 6: Final answer
    x = 103,139.50

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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.