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Finding the Fourth Proportional to 100,179.69, 138,247.97 and 57,740.96

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Solution

The fourth proportional to 100,179.69, 138,247.97 and 57,740.96 is: 79,682.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,179.69 : 138,247.97 = 57,740.96 : x
  2. Step 2: Convert to fraction form
    100,179.69/138,247.97 = 57,740.96/x
  3. Step 3: Cross multiply
    100,179.69x = 138,247.97 × 57,740.96
  4. Step 4: Simplify right side
    100,179.69x = 7,982,569,814.61
  5. Step 5: Solve for x
    x = 7,982,569,814.61/100,179.69
  6. Step 6: Final answer
    x = 79,682.52

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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.