Home / 138,675.18-191,357.64-80,511.78

Finding the Fourth Proportional to 138,675.18, 191,357.64 and 80,511.78

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Solution

The fourth proportional to 138,675.18, 191,357.64 and 80,511.78 is: 111,098.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,675.18 : 191,357.64 = 80,511.78 : x
  2. Step 2: Convert to fraction form
    138,675.18/191,357.64 = 80,511.78/x
  3. Step 3: Cross multiply
    138,675.18x = 191,357.64 × 80,511.78
  4. Step 4: Simplify right side
    138,675.18x = 15,406,544,213.00
  5. Step 5: Solve for x
    x = 15,406,544,213.00/138,675.18
  6. Step 6: Final answer
    x = 111,098.07

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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.