Home / 278,116.80-417,175.20-91,128.30

Finding the Fourth Proportional to 278,116.80, 417,175.20 and 91,128.30

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Solution

The fourth proportional to 278,116.80, 417,175.20 and 91,128.30 is: 136,692.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,116.80 : 417,175.20 = 91,128.30 : x
  2. Step 2: Convert to fraction form
    278,116.80/417,175.20 = 91,128.30/x
  3. Step 3: Cross multiply
    278,116.80x = 417,175.20 × 91,128.30
  4. Step 4: Simplify right side
    278,116.80x = 38,016,466,778.16
  5. Step 5: Solve for x
    x = 38,016,466,778.16/278,116.80
  6. Step 6: Final answer
    x = 136,692.45

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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.