Home / 120,904.20-181,356.30-76,386.60

Finding the Fourth Proportional to 120,904.20, 181,356.30 and 76,386.60

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Solution

The fourth proportional to 120,904.20, 181,356.30 and 76,386.60 is: 114,579.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,904.20 : 181,356.30 = 76,386.60 : x
  2. Step 2: Convert to fraction form
    120,904.20/181,356.30 = 76,386.60/x
  3. Step 3: Cross multiply
    120,904.20x = 181,356.30 × 76,386.60
  4. Step 4: Simplify right side
    120,904.20x = 13,853,191,145.58
  5. Step 5: Solve for x
    x = 13,853,191,145.58/120,904.20
  6. Step 6: Final answer
    x = 114,579.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.