Home / 131,438.40-181,357.92-77,724.96

Finding the Fourth Proportional to 131,438.40, 181,357.92 and 77,724.96

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Solution

The fourth proportional to 131,438.40, 181,357.92 and 77,724.96 is: 107,244.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,438.40 : 181,357.92 = 77,724.96 : x
  2. Step 2: Convert to fraction form
    131,438.40/181,357.92 = 77,724.96/x
  3. Step 3: Cross multiply
    131,438.40x = 181,357.92 × 77,724.96
  4. Step 4: Simplify right side
    131,438.40x = 14,096,037,077.68
  5. Step 5: Solve for x
    x = 14,096,037,077.68/131,438.40
  6. Step 6: Final answer
    x = 107,244.44

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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.