Home / 81,711.71-122,535.97-31,785.06

Finding the Fourth Proportional to 81,711.71, 122,535.97 and 31,785.06

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Solution

The fourth proportional to 81,711.71, 122,535.97 and 31,785.06 is: 47,665.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,711.71 : 122,535.97 = 31,785.06 : x
  2. Step 2: Convert to fraction form
    81,711.71/122,535.97 = 31,785.06/x
  3. Step 3: Cross multiply
    81,711.71x = 122,535.97 × 31,785.06
  4. Step 4: Simplify right side
    81,711.71x = 3,894,812,999.68
  5. Step 5: Solve for x
    x = 3,894,812,999.68/81,711.71
  6. Step 6: Final answer
    x = 47,665.30

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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.