Home / 120,752.20-181,128.30-83,427.40

Finding the Fourth Proportional to 120,752.20, 181,128.30 and 83,427.40

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Solution

The fourth proportional to 120,752.20, 181,128.30 and 83,427.40 is: 125,141.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,752.20 : 181,128.30 = 83,427.40 : x
  2. Step 2: Convert to fraction form
    120,752.20/181,128.30 = 83,427.40/x
  3. Step 3: Cross multiply
    120,752.20x = 181,128.30 × 83,427.40
  4. Step 4: Simplify right side
    120,752.20x = 15,111,063,135.42
  5. Step 5: Solve for x
    x = 15,111,063,135.42/120,752.20
  6. Step 6: Final answer
    x = 125,141.10

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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.