Home / 81,364.86-121,331.36-74,902.14

Finding the Fourth Proportional to 81,364.86, 121,331.36 and 74,902.14

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Solution

The fourth proportional to 81,364.86, 121,331.36 and 74,902.14 is: 111,694.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,364.86 : 121,331.36 = 74,902.14 : x
  2. Step 2: Convert to fraction form
    81,364.86/121,331.36 = 74,902.14/x
  3. Step 3: Cross multiply
    81,364.86x = 121,331.36 × 74,902.14
  4. Step 4: Simplify right side
    81,364.86x = 9,087,978,138.60
  5. Step 5: Solve for x
    x = 9,087,978,138.60/81,364.86
  6. Step 6: Final answer
    x = 111,694.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.