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Finding the Fourth Proportional to 90,294.70, 135,317.49 and 68,083.67

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Solution

The fourth proportional to 90,294.70, 135,317.49 and 68,083.67 is: 102,031.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,294.70 : 135,317.49 = 68,083.67 : x
  2. Step 2: Convert to fraction form
    90,294.70/135,317.49 = 68,083.67/x
  3. Step 3: Cross multiply
    90,294.70x = 135,317.49 × 68,083.67
  4. Step 4: Simplify right side
    90,294.70x = 9,212,910,657.80
  5. Step 5: Solve for x
    x = 9,212,910,657.80/90,294.70
  6. Step 6: Final answer
    x = 102,031.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.