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Finding the Fourth Proportional to 121,587.75, 182,583.32 and 75,135.87

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Solution

The fourth proportional to 121,587.75, 182,583.32 and 75,135.87 is: 112,828.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,587.75 : 182,583.32 = 75,135.87 : x
  2. Step 2: Convert to fraction form
    121,587.75/182,583.32 = 75,135.87/x
  3. Step 3: Cross multiply
    121,587.75x = 182,583.32 × 75,135.87
  4. Step 4: Simplify right side
    121,587.75x = 13,718,556,220.01
  5. Step 5: Solve for x
    x = 13,718,556,220.01/121,587.75
  6. Step 6: Final answer
    x = 112,828.44

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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.