Home / 81,981.40-122,972.10-25,828.60

Finding the Fourth Proportional to 81,981.40, 122,972.10 and 25,828.60

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Solution

The fourth proportional to 81,981.40, 122,972.10 and 25,828.60 is: 38,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.40 : 122,972.10 = 25,828.60 : x
  2. Step 2: Convert to fraction form
    81,981.40/122,972.10 = 25,828.60/x
  3. Step 3: Cross multiply
    81,981.40x = 122,972.10 × 25,828.60
  4. Step 4: Simplify right side
    81,981.40x = 3,176,197,182.06
  5. Step 5: Solve for x
    x = 3,176,197,182.06/81,981.40
  6. Step 6: Final answer
    x = 38,742.90

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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.