Home / 100,154.43-138,213.15-54,835.35

Finding the Fourth Proportional to 100,154.43, 138,213.15 and 54,835.35

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Solution

The fourth proportional to 100,154.43, 138,213.15 and 54,835.35 is: 75,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,154.43 : 138,213.15 = 54,835.35 : x
  2. Step 2: Convert to fraction form
    100,154.43/138,213.15 = 54,835.35/x
  3. Step 3: Cross multiply
    100,154.43x = 138,213.15 × 54,835.35
  4. Step 4: Simplify right side
    100,154.43x = 7,578,966,454.85
  5. Step 5: Solve for x
    x = 7,578,966,454.85/100,154.43
  6. Step 6: Final answer
    x = 75,672.80

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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.