Home / 81,081.42-121,622.56-53,178.17

Finding the Fourth Proportional to 81,081.42, 121,622.56 and 53,178.17

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Solution

The fourth proportional to 81,081.42, 121,622.56 and 53,178.17 is: 79,767.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.42 : 121,622.56 = 53,178.17 : x
  2. Step 2: Convert to fraction form
    81,081.42/121,622.56 = 53,178.17/x
  3. Step 3: Cross multiply
    81,081.42x = 121,622.56 × 53,178.17
  4. Step 4: Simplify right side
    81,081.42x = 6,467,665,606.21
  5. Step 5: Solve for x
    x = 6,467,665,606.21/81,081.42
  6. Step 6: Final answer
    x = 79,767.54

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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.