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Finding the Fourth Proportional to 88,230, 121,757.40 and 48,486

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Solution

The fourth proportional to 88,230, 121,757.40 and 48,486 is: 66,910.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,230 : 121,757.40 = 48,486 : x
  2. Step 2: Convert to fraction form
    88,230/121,757.40 = 48,486/x
  3. Step 3: Cross multiply
    88,230x = 121,757.40 × 48,486
  4. Step 4: Simplify right side
    88,230x = 5,903,529,296.40
  5. Step 5: Solve for x
    x = 5,903,529,296.40/88,230
  6. Step 6: Final answer
    x = 66,910.68

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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.