Home / 90,675.72-125,193.51-81,085.74

Finding the Fourth Proportional to 90,675.72, 125,193.51 and 81,085.74

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Solution

The fourth proportional to 90,675.72, 125,193.51 and 81,085.74 is: 111,952.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,675.72 : 125,193.51 = 81,085.74 : x
  2. Step 2: Convert to fraction form
    90,675.72/125,193.51 = 81,085.74/x
  3. Step 3: Cross multiply
    90,675.72x = 125,193.51 × 81,085.74
  4. Step 4: Simplify right side
    90,675.72x = 10,151,408,401.55
  5. Step 5: Solve for x
    x = 10,151,408,401.55/90,675.72
  6. Step 6: Final answer
    x = 111,952.88

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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.