Home / 120,387.11-166,079.09-77,959.31

Finding the Fourth Proportional to 120,387.11, 166,079.09 and 77,959.31

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Solution

The fourth proportional to 120,387.11, 166,079.09 and 77,959.31 is: 107,548.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,387.11 : 166,079.09 = 77,959.31 : x
  2. Step 2: Convert to fraction form
    120,387.11/166,079.09 = 77,959.31/x
  3. Step 3: Cross multiply
    120,387.11x = 166,079.09 × 77,959.31
  4. Step 4: Simplify right side
    120,387.11x = 12,947,410,041.64
  5. Step 5: Solve for x
    x = 12,947,410,041.64/120,387.11
  6. Step 6: Final answer
    x = 107,548.15

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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.