Home / 100,080.12-138,202.43-64,332.39

Finding the Fourth Proportional to 100,080.12, 138,202.43 and 64,332.39

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Solution

The fourth proportional to 100,080.12, 138,202.43 and 64,332.39 is: 88,837.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,080.12 : 138,202.43 = 64,332.39 : x
  2. Step 2: Convert to fraction form
    100,080.12/138,202.43 = 64,332.39/x
  3. Step 3: Cross multiply
    100,080.12x = 138,202.43 × 64,332.39
  4. Step 4: Simplify right side
    100,080.12x = 8,890,892,304.05
  5. Step 5: Solve for x
    x = 8,890,892,304.05/100,080.12
  6. Step 6: Final answer
    x = 88,837.75

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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.