Home / 81,939.12-113,081.04-47,948.28

Finding the Fourth Proportional to 81,939.12, 113,081.04 and 47,948.28

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Solution

The fourth proportional to 81,939.12, 113,081.04 and 47,948.28 is: 66,171.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,939.12 : 113,081.04 = 47,948.28 : x
  2. Step 2: Convert to fraction form
    81,939.12/113,081.04 = 47,948.28/x
  3. Step 3: Cross multiply
    81,939.12x = 113,081.04 × 47,948.28
  4. Step 4: Simplify right side
    81,939.12x = 5,422,041,368.61
  5. Step 5: Solve for x
    x = 5,422,041,368.61/81,939.12
  6. Step 6: Final answer
    x = 66,171.58

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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.