Home / 81,161.56-121,574.62-47,778.76

Finding the Fourth Proportional to 81,161.56, 121,574.62 and 47,778.76

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Solution

The fourth proportional to 81,161.56, 121,574.62 and 47,778.76 is: 71,569.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,161.56 : 121,574.62 = 47,778.76 : x
  2. Step 2: Convert to fraction form
    81,161.56/121,574.62 = 47,778.76/x
  3. Step 3: Cross multiply
    81,161.56x = 121,574.62 × 47,778.76
  4. Step 4: Simplify right side
    81,161.56x = 5,808,684,591.07
  5. Step 5: Solve for x
    x = 5,808,684,591.07/81,161.56
  6. Step 6: Final answer
    x = 71,569.41

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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.