Home / 81,944,115.40-122,916,173.10-78,164,979.40

Finding the Fourth Proportional to 81,944,115.40, 122,916,173.10 and 78,164,979.40

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Solution

The fourth proportional to 81,944,115.40, 122,916,173.10 and 78,164,979.40 is: 117,247,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,944,115.40 : 122,916,173.10 = 78,164,979.40 : x
  2. Step 2: Convert to fraction form
    81,944,115.40/122,916,173.10 = 78,164,979.40/x
  3. Step 3: Cross multiply
    81,944,115.40x = 122,916,173.10 × 78,164,979.40
  4. Step 4: Simplify right side
    81,944,115.40x = 9,607,740,138,288,334
  5. Step 5: Solve for x
    x = 9,607,740,138,288,334/81,944,115.40
  6. Step 6: Final answer
    x = 117,247,469.10

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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.