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Finding the Fourth Proportional to 86,662.74, 129,994.11 and 31,258.74

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Solution

The fourth proportional to 86,662.74, 129,994.11 and 31,258.74 is: 46,888.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,662.74 : 129,994.11 = 31,258.74 : x
  2. Step 2: Convert to fraction form
    86,662.74/129,994.11 = 31,258.74/x
  3. Step 3: Cross multiply
    86,662.74x = 129,994.11 × 31,258.74
  4. Step 4: Simplify right side
    86,662.74x = 4,063,452,086.02
  5. Step 5: Solve for x
    x = 4,063,452,086.02/86,662.74
  6. Step 6: Final answer
    x = 46,888.11

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.