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Finding the Fourth Proportional to 88,388.35, 121,978.68 and 50,149.50

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Solution

The fourth proportional to 88,388.35, 121,978.68 and 50,149.50 is: 69,207.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,388.35 : 121,978.68 = 50,149.50 : x
  2. Step 2: Convert to fraction form
    88,388.35/121,978.68 = 50,149.50/x
  3. Step 3: Cross multiply
    88,388.35x = 121,978.68 × 50,149.50
  4. Step 4: Simplify right side
    88,388.35x = 6,117,169,167.18
  5. Step 5: Solve for x
    x = 6,117,169,167.18/88,388.35
  6. Step 6: Final answer
    x = 69,207.87

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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.