Home / 100,154.52-138,213.36-57,711.96

Finding the Fourth Proportional to 100,154.52, 138,213.36 and 57,711.96

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Solution

The fourth proportional to 100,154.52, 138,213.36 and 57,711.96 is: 79,642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,154.52 : 138,213.36 = 57,711.96 : x
  2. Step 2: Convert to fraction form
    100,154.52/138,213.36 = 57,711.96/x
  3. Step 3: Cross multiply
    100,154.52x = 138,213.36 × 57,711.96
  4. Step 4: Simplify right side
    100,154.52x = 7,976,563,903.79
  5. Step 5: Solve for x
    x = 7,976,563,903.79/100,154.52
  6. Step 6: Final answer
    x = 79,642.58

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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.