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Finding the Fourth Proportional to 278,832.32, 418,247.64 and 79,152.88

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Solution

The fourth proportional to 278,832.32, 418,247.64 and 79,152.88 is: 118,729.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,832.32 : 418,247.64 = 79,152.88 : x
  2. Step 2: Convert to fraction form
    278,832.32/418,247.64 = 79,152.88/x
  3. Step 3: Cross multiply
    278,832.32x = 418,247.64 × 79,152.88
  4. Step 4: Simplify right side
    278,832.32x = 33,105,505,259.20
  5. Step 5: Solve for x
    x = 33,105,505,259.20/278,832.32
  6. Step 6: Final answer
    x = 118,729.08

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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.