Home / 91,909.84-126,820.32-54,178.96

Finding the Fourth Proportional to 91,909.84, 126,820.32 and 54,178.96

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Solution

The fourth proportional to 91,909.84, 126,820.32 and 54,178.96 is: 74,757.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,909.84 : 126,820.32 = 54,178.96 : x
  2. Step 2: Convert to fraction form
    91,909.84/126,820.32 = 54,178.96/x
  3. Step 3: Cross multiply
    91,909.84x = 126,820.32 × 54,178.96
  4. Step 4: Simplify right side
    91,909.84x = 6,870,993,044.47
  5. Step 5: Solve for x
    x = 6,870,993,044.47/91,909.84
  6. Step 6: Final answer
    x = 74,757.97

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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.