Home / 137,449.42-189,680.10-77,020.54

Finding the Fourth Proportional to 137,449.42, 189,680.10 and 77,020.54

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Solution

The fourth proportional to 137,449.42, 189,680.10 and 77,020.54 is: 106,288.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,449.42 : 189,680.10 = 77,020.54 : x
  2. Step 2: Convert to fraction form
    137,449.42/189,680.10 = 77,020.54/x
  3. Step 3: Cross multiply
    137,449.42x = 189,680.10 × 77,020.54
  4. Step 4: Simplify right side
    137,449.42x = 14,609,263,729.25
  5. Step 5: Solve for x
    x = 14,609,263,729.25/137,449.42
  6. Step 6: Final answer
    x = 106,288.29

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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.