Home / 278,837.60-418,256.40-91,824.80

Finding the Fourth Proportional to 278,837.60, 418,256.40 and 91,824.80

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Solution

The fourth proportional to 278,837.60, 418,256.40 and 91,824.80 is: 137,737.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,837.60 : 418,256.40 = 91,824.80 : x
  2. Step 2: Convert to fraction form
    278,837.60/418,256.40 = 91,824.80/x
  3. Step 3: Cross multiply
    278,837.60x = 418,256.40 × 91,824.80
  4. Step 4: Simplify right side
    278,837.60x = 38,406,310,278.72
  5. Step 5: Solve for x
    x = 38,406,310,278.72/278,837.60
  6. Step 6: Final answer
    x = 137,737.20

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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.