Home / 121,288.51-181,965.60-68,734.90

Finding the Fourth Proportional to 121,288.51, 181,965.60 and 68,734.90

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Solution

The fourth proportional to 121,288.51, 181,965.60 and 68,734.90 is: 103,120.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,288.51 : 181,965.60 = 68,734.90 : x
  2. Step 2: Convert to fraction form
    121,288.51/181,965.60 = 68,734.90/x
  3. Step 3: Cross multiply
    121,288.51x = 181,965.60 × 68,734.90
  4. Step 4: Simplify right side
    121,288.51x = 12,507,387,319.44
  5. Step 5: Solve for x
    x = 12,507,387,319.44/121,288.51
  6. Step 6: Final answer
    x = 103,120.96

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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.