Home / 81,378.32-121,968.92-34,532.78

Finding the Fourth Proportional to 81,378.32, 121,968.92 and 34,532.78

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Solution

The fourth proportional to 81,378.32, 121,968.92 and 34,532.78 is: 51,757.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.32 : 121,968.92 = 34,532.78 : x
  2. Step 2: Convert to fraction form
    81,378.32/121,968.92 = 34,532.78/x
  3. Step 3: Cross multiply
    81,378.32x = 121,968.92 × 34,532.78
  4. Step 4: Simplify right side
    81,378.32x = 4,211,925,881.20
  5. Step 5: Solve for x
    x = 4,211,925,881.20/81,378.32
  6. Step 6: Final answer
    x = 51,757.35

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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.