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Finding the Fourth Proportional to 121,230.90, 181,846.35 and 68,742.90

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Solution

The fourth proportional to 121,230.90, 181,846.35 and 68,742.90 is: 103,114.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,230.90 : 181,846.35 = 68,742.90 : x
  2. Step 2: Convert to fraction form
    121,230.90/181,846.35 = 68,742.90/x
  3. Step 3: Cross multiply
    121,230.90x = 181,846.35 × 68,742.90
  4. Step 4: Simplify right side
    121,230.90x = 12,500,645,453.42
  5. Step 5: Solve for x
    x = 12,500,645,453.42/121,230.90
  6. Step 6: Final answer
    x = 103,114.35

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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.