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Finding the Fourth Proportional to 121,152.39, 167,187.87 and 75,855.39

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Solution

The fourth proportional to 121,152.39, 167,187.87 and 75,855.39 is: 104,678.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,152.39 : 167,187.87 = 75,855.39 : x
  2. Step 2: Convert to fraction form
    121,152.39/167,187.87 = 75,855.39/x
  3. Step 3: Cross multiply
    121,152.39x = 167,187.87 × 75,855.39
  4. Step 4: Simplify right side
    121,152.39x = 12,682,101,082.12
  5. Step 5: Solve for x
    x = 12,682,101,082.12/121,152.39
  6. Step 6: Final answer
    x = 104,678.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.