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Finding the Fourth Proportional to 88,231, 121,758.78 and 48,487

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Solution

The fourth proportional to 88,231, 121,758.78 and 48,487 is: 66,912.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,231 : 121,758.78 = 48,487 : x
  2. Step 2: Convert to fraction form
    88,231/121,758.78 = 48,487/x
  3. Step 3: Cross multiply
    88,231x = 121,758.78 × 48,487
  4. Step 4: Simplify right side
    88,231x = 5,903,717,965.86
  5. Step 5: Solve for x
    x = 5,903,717,965.86/88,231
  6. Step 6: Final answer
    x = 66,912.06

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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.