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Finding the Fourth Proportional to 84,482.78, 126,748.11 and 42,311.93

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Solution

The fourth proportional to 84,482.78, 126,748.11 and 42,311.93 is: 63,479.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,482.78 : 126,748.11 = 42,311.93 : x
  2. Step 2: Convert to fraction form
    84,482.78/126,748.11 = 42,311.93/x
  3. Step 3: Cross multiply
    84,482.78x = 126,748.11 × 42,311.93
  4. Step 4: Simplify right side
    84,482.78x = 5,362,957,157.95
  5. Step 5: Solve for x
    x = 5,362,957,157.95/84,482.78
  6. Step 6: Final answer
    x = 63,479.88

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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.