Home / 109,081.47-150,408.32-76,805.78

Finding the Fourth Proportional to 109,081.47, 150,408.32 and 76,805.78

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Solution

The fourth proportional to 109,081.47, 150,408.32 and 76,805.78 is: 105,904.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,081.47 : 150,408.32 = 76,805.78 : x
  2. Step 2: Convert to fraction form
    109,081.47/150,408.32 = 76,805.78/x
  3. Step 3: Cross multiply
    109,081.47x = 150,408.32 × 76,805.78
  4. Step 4: Simplify right side
    109,081.47x = 11,552,227,200.02
  5. Step 5: Solve for x
    x = 11,552,227,200.02/109,081.47
  6. Step 6: Final answer
    x = 105,904.58

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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.