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Finding the Fourth Proportional to 88,565, 122,219.70 and 55,031

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Solution

The fourth proportional to 88,565, 122,219.70 and 55,031 is: 75,942.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,565 : 122,219.70 = 55,031 : x
  2. Step 2: Convert to fraction form
    88,565/122,219.70 = 55,031/x
  3. Step 3: Cross multiply
    88,565x = 122,219.70 × 55,031
  4. Step 4: Simplify right side
    88,565x = 6,725,872,310.70
  5. Step 5: Solve for x
    x = 6,725,872,310.70/88,565
  6. Step 6: Final answer
    x = 75,942.78

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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.