Home / 120,721.80-181,010.70-74,008.20

Finding the Fourth Proportional to 120,721.80, 181,010.70 and 74,008.20

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Solution

The fourth proportional to 120,721.80, 181,010.70 and 74,008.20 is: 110,968.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,721.80 : 181,010.70 = 74,008.20 : x
  2. Step 2: Convert to fraction form
    120,721.80/181,010.70 = 74,008.20/x
  3. Step 3: Cross multiply
    120,721.80x = 181,010.70 × 74,008.20
  4. Step 4: Simplify right side
    120,721.80x = 13,396,276,087.74
  5. Step 5: Solve for x
    x = 13,396,276,087.74/120,721.80
  6. Step 6: Final answer
    x = 110,968.16

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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.