Home / 278,962.83-418,381.38-79,278.80

Finding the Fourth Proportional to 278,962.83, 418,381.38 and 79,278.80

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Solution

The fourth proportional to 278,962.83, 418,381.38 and 79,278.80 is: 118,900.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,962.83 : 418,381.38 = 79,278.80 : x
  2. Step 2: Convert to fraction form
    278,962.83/418,381.38 = 79,278.80/x
  3. Step 3: Cross multiply
    278,962.83x = 418,381.38 × 79,278.80
  4. Step 4: Simplify right side
    278,962.83x = 33,168,771,656.84
  5. Step 5: Solve for x
    x = 33,168,771,656.84/278,962.83
  6. Step 6: Final answer
    x = 118,900.33

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1.5x scale

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.