Home / 278,841.24-418,199.16-79,157.40

Finding the Fourth Proportional to 278,841.24, 418,199.16 and 79,157.40

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Solution

The fourth proportional to 278,841.24, 418,199.16 and 79,157.40 is: 118,718.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,841.24 : 418,199.16 = 79,157.40 : x
  2. Step 2: Convert to fraction form
    278,841.24/418,199.16 = 79,157.40/x
  3. Step 3: Cross multiply
    278,841.24x = 418,199.16 × 79,157.40
  4. Step 4: Simplify right side
    278,841.24x = 33,103,558,187.78
  5. Step 5: Solve for x
    x = 33,103,558,187.78/278,841.24
  6. Step 6: Final answer
    x = 118,718.30

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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.