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Finding the Fourth Proportional to 88,215, 121,736.70 and 48,471

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Solution

The fourth proportional to 88,215, 121,736.70 and 48,471 is: 66,889.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,215 : 121,736.70 = 48,471 : x
  2. Step 2: Convert to fraction form
    88,215/121,736.70 = 48,471/x
  3. Step 3: Cross multiply
    88,215x = 121,736.70 × 48,471
  4. Step 4: Simplify right side
    88,215x = 5,900,699,585.70
  5. Step 5: Solve for x
    x = 5,900,699,585.70/88,215
  6. Step 6: Final answer
    x = 66,889.98

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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.