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Finding the Fourth Proportional to 81,278.10, 113,867.10 and 81,278.10

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Solution

The fourth proportional to 81,278.10, 113,867.10 and 81,278.10 is: 113,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.10 : 113,867.10 = 81,278.10 : x
  2. Step 2: Convert to fraction form
    81,278.10/113,867.10 = 81,278.10/x
  3. Step 3: Cross multiply
    81,278.10x = 113,867.10 × 81,278.10
  4. Step 4: Simplify right side
    81,278.10x = 9,254,901,540.51
  5. Step 5: Solve for x
    x = 9,254,901,540.51/81,278.10
  6. Step 6: Final answer
    x = 113,867.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.