Home / 138,577.14-191,221.65-78,146.46

Finding the Fourth Proportional to 138,577.14, 191,221.65 and 78,146.46

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Solution

The fourth proportional to 138,577.14, 191,221.65 and 78,146.46 is: 107,833.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,577.14 : 191,221.65 = 78,146.46 : x
  2. Step 2: Convert to fraction form
    138,577.14/191,221.65 = 78,146.46/x
  3. Step 3: Cross multiply
    138,577.14x = 191,221.65 × 78,146.46
  4. Step 4: Simplify right side
    138,577.14x = 14,943,295,022.86
  5. Step 5: Solve for x
    x = 14,943,295,022.86/138,577.14
  6. Step 6: Final answer
    x = 107,833.77

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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.