Home / 90,519.78-124,904.54-54,212.72

Finding the Fourth Proportional to 90,519.78, 124,904.54 and 54,212.72

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Solution

The fourth proportional to 90,519.78, 124,904.54 and 54,212.72 is: 74,805.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,519.78 : 124,904.54 = 54,212.72 : x
  2. Step 2: Convert to fraction form
    90,519.78/124,904.54 = 54,212.72/x
  3. Step 3: Cross multiply
    90,519.78x = 124,904.54 × 54,212.72
  4. Step 4: Simplify right side
    90,519.78x = 6,771,414,161.46
  5. Step 5: Solve for x
    x = 6,771,414,161.46/90,519.78
  6. Step 6: Final answer
    x = 74,805.91

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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.