Home / 85,390.66-117,872.34-76,422.59

Finding the Fourth Proportional to 85,390.66, 117,872.34 and 76,422.59

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Solution

The fourth proportional to 85,390.66, 117,872.34 and 76,422.59 is: 105,492.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,390.66 : 117,872.34 = 76,422.59 : x
  2. Step 2: Convert to fraction form
    85,390.66/117,872.34 = 76,422.59/x
  3. Step 3: Cross multiply
    85,390.66x = 117,872.34 × 76,422.59
  4. Step 4: Simplify right side
    85,390.66x = 9,008,109,508.11
  5. Step 5: Solve for x
    x = 9,008,109,508.11/85,390.66
  6. Step 6: Final answer
    x = 105,492.91

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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.