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Finding the Fourth Proportional to 88,324.20, 132,486.30 and 78,647.40

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Solution

The fourth proportional to 88,324.20, 132,486.30 and 78,647.40 is: 117,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,324.20 : 132,486.30 = 78,647.40 : x
  2. Step 2: Convert to fraction form
    88,324.20/132,486.30 = 78,647.40/x
  3. Step 3: Cross multiply
    88,324.20x = 132,486.30 × 78,647.40
  4. Step 4: Simplify right side
    88,324.20x = 10,419,703,030.62
  5. Step 5: Solve for x
    x = 10,419,703,030.62/88,324.20
  6. Step 6: Final answer
    x = 117,971.10

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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.