Home / 85,835.12-128,758.34-29,680.66

Finding the Fourth Proportional to 85,835.12, 128,758.34 and 29,680.66

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Solution

The fourth proportional to 85,835.12, 128,758.34 and 29,680.66 is: 44,522.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,835.12 : 128,758.34 = 29,680.66 : x
  2. Step 2: Convert to fraction form
    85,835.12/128,758.34 = 29,680.66/x
  3. Step 3: Cross multiply
    85,835.12x = 128,758.34 × 29,680.66
  4. Step 4: Simplify right side
    85,835.12x = 3,821,632,511.70
  5. Step 5: Solve for x
    x = 3,821,632,511.70/85,835.12
  6. Step 6: Final answer
    x = 44,522.95

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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.