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Finding the Fourth Proportional to 141,904.82, 212,616.34 and 85,626.67

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Solution

The fourth proportional to 141,904.82, 212,616.34 and 85,626.67 is: 128,294.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,904.82 : 212,616.34 = 85,626.67 : x
  2. Step 2: Convert to fraction form
    141,904.82/212,616.34 = 85,626.67/x
  3. Step 3: Cross multiply
    141,904.82x = 212,616.34 × 85,626.67
  4. Step 4: Simplify right side
    141,904.82x = 18,205,628,118.71
  5. Step 5: Solve for x
    x = 18,205,628,118.71/141,904.82
  6. Step 6: Final answer
    x = 128,294.65

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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.