Home / 268,631.60-402,947.40-81,618.80

Finding the Fourth Proportional to 268,631.60, 402,947.40 and 81,618.80

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Solution

The fourth proportional to 268,631.60, 402,947.40 and 81,618.80 is: 122,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,631.60 : 402,947.40 = 81,618.80 : x
  2. Step 2: Convert to fraction form
    268,631.60/402,947.40 = 81,618.80/x
  3. Step 3: Cross multiply
    268,631.60x = 402,947.40 × 81,618.80
  4. Step 4: Simplify right side
    268,631.60x = 32,888,083,251.12
  5. Step 5: Solve for x
    x = 32,888,083,251.12/268,631.60
  6. Step 6: Final answer
    x = 122,428.20

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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.