Home / 81,819.32-112,912.20-47,830.71

Finding the Fourth Proportional to 81,819.32, 112,912.20 and 47,830.71

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Solution

The fourth proportional to 81,819.32, 112,912.20 and 47,830.71 is: 66,007.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,819.32 : 112,912.20 = 47,830.71 : x
  2. Step 2: Convert to fraction form
    81,819.32/112,912.20 = 47,830.71/x
  3. Step 3: Cross multiply
    81,819.32x = 112,912.20 × 47,830.71
  4. Step 4: Simplify right side
    81,819.32x = 5,400,670,454.51
  5. Step 5: Solve for x
    x = 5,400,670,454.51/81,819.32
  6. Step 6: Final answer
    x = 66,007.28

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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.