Home / 121,286.51-181,962.60-68,732.90

Finding the Fourth Proportional to 121,286.51, 181,962.60 and 68,732.90

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Solution

The fourth proportional to 121,286.51, 181,962.60 and 68,732.90 is: 103,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,286.51 : 181,962.60 = 68,732.90 : x
  2. Step 2: Convert to fraction form
    121,286.51/181,962.60 = 68,732.90/x
  3. Step 3: Cross multiply
    121,286.51x = 181,962.60 × 68,732.90
  4. Step 4: Simplify right side
    121,286.51x = 12,506,817,189.54
  5. Step 5: Solve for x
    x = 12,506,817,189.54/121,286.51
  6. Step 6: Final answer
    x = 103,117.96

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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.