Home / 100,172.96-138,242.41-57,159.46

Finding the Fourth Proportional to 100,172.96, 138,242.41 and 57,159.46

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Solution

The fourth proportional to 100,172.96, 138,242.41 and 57,159.46 is: 78,882.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,172.96 : 138,242.41 = 57,159.46 : x
  2. Step 2: Convert to fraction form
    100,172.96/138,242.41 = 57,159.46/x
  3. Step 3: Cross multiply
    100,172.96x = 138,242.41 × 57,159.46
  4. Step 4: Simplify right side
    100,172.96x = 7,901,861,504.70
  5. Step 5: Solve for x
    x = 7,901,861,504.70/100,172.96
  6. Step 6: Final answer
    x = 78,882.18

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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.