Home / 278,108.50-417,175.71-81,116.50

Finding the Fourth Proportional to 278,108.50, 417,175.71 and 81,116.50

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Solution

The fourth proportional to 278,108.50, 417,175.71 and 81,116.50 is: 121,678.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,108.50 : 417,175.71 = 81,116.50 : x
  2. Step 2: Convert to fraction form
    278,108.50/417,175.71 = 81,116.50/x
  3. Step 3: Cross multiply
    278,108.50x = 417,175.71 × 81,116.50
  4. Step 4: Simplify right side
    278,108.50x = 33,839,833,480.22
  5. Step 5: Solve for x
    x = 33,839,833,480.22/278,108.50
  6. Step 6: Final answer
    x = 121,678.53

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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.