Home / 81,981.16-113,142.07-47,987.58

Finding the Fourth Proportional to 81,981.16, 113,142.07 and 47,987.58

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Solution

The fourth proportional to 81,981.16, 113,142.07 and 47,987.58 is: 66,227.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.16 : 113,142.07 = 47,987.58 : x
  2. Step 2: Convert to fraction form
    81,981.16/113,142.07 = 47,987.58/x
  3. Step 3: Cross multiply
    81,981.16x = 113,142.07 × 47,987.58
  4. Step 4: Simplify right side
    81,981.16x = 5,429,414,439.80
  5. Step 5: Solve for x
    x = 5,429,414,439.80/81,981.16
  6. Step 6: Final answer
    x = 66,227.59

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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.