Home / 81,158.13-121,698.87-47,433.82

Finding the Fourth Proportional to 81,158.13, 121,698.87 and 47,433.82

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Solution

The fourth proportional to 81,158.13, 121,698.87 and 47,433.82 is: 71,128.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,158.13 : 121,698.87 = 47,433.82 : x
  2. Step 2: Convert to fraction form
    81,158.13/121,698.87 = 47,433.82/x
  3. Step 3: Cross multiply
    81,158.13x = 121,698.87 × 47,433.82
  4. Step 4: Simplify right side
    81,158.13x = 5,772,642,293.78
  5. Step 5: Solve for x
    x = 5,772,642,293.78/81,158.13
  6. Step 6: Final answer
    x = 71,128.33

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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.