Home / 85,255.46-117,615.20-81,302.66

Finding the Fourth Proportional to 85,255.46, 117,615.20 and 81,302.66

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Solution

The fourth proportional to 85,255.46, 117,615.20 and 81,302.66 is: 112,162.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,255.46 : 117,615.20 = 81,302.66 : x
  2. Step 2: Convert to fraction form
    85,255.46/117,615.20 = 81,302.66/x
  3. Step 3: Cross multiply
    85,255.46x = 117,615.20 × 81,302.66
  4. Step 4: Simplify right side
    85,255.46x = 9,562,428,616.43
  5. Step 5: Solve for x
    x = 9,562,428,616.43/85,255.46
  6. Step 6: Final answer
    x = 112,162.07

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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.