Home / 81,378.90-122,061.44-25,217.76

Finding the Fourth Proportional to 81,378.90, 122,061.44 and 25,217.76

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Solution

The fourth proportional to 81,378.90, 122,061.44 and 25,217.76 is: 37,824.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.90 : 122,061.44 = 25,217.76 : x
  2. Step 2: Convert to fraction form
    81,378.90/122,061.44 = 25,217.76/x
  3. Step 3: Cross multiply
    81,378.90x = 122,061.44 × 25,217.76
  4. Step 4: Simplify right side
    81,378.90x = 3,078,116,099.17
  5. Step 5: Solve for x
    x = 3,078,116,099.17/81,378.90
  6. Step 6: Final answer
    x = 37,824.50

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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.