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Finding the Fourth Proportional to 88,486.71, 121,992.26 and 85,734.87

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Solution

The fourth proportional to 88,486.71, 121,992.26 and 85,734.87 is: 118,198.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,486.71 : 121,992.26 = 85,734.87 : x
  2. Step 2: Convert to fraction form
    88,486.71/121,992.26 = 85,734.87/x
  3. Step 3: Cross multiply
    88,486.71x = 121,992.26 × 85,734.87
  4. Step 4: Simplify right side
    88,486.71x = 10,458,990,123.43
  5. Step 5: Solve for x
    x = 10,458,990,123.43/88,486.71
  6. Step 6: Final answer
    x = 118,198.43

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1.5x scale

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.