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Finding the Fourth Proportional to 137,118.30, 189,211.50 and 79,758.78

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Solution

The fourth proportional to 137,118.30, 189,211.50 and 79,758.78 is: 110,060.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,118.30 : 189,211.50 = 79,758.78 : x
  2. Step 2: Convert to fraction form
    137,118.30/189,211.50 = 79,758.78/x
  3. Step 3: Cross multiply
    137,118.30x = 189,211.50 × 79,758.78
  4. Step 4: Simplify right side
    137,118.30x = 15,091,278,401.97
  5. Step 5: Solve for x
    x = 15,091,278,401.97/137,118.30
  6. Step 6: Final answer
    x = 110,060.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.