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Finding the Fourth Proportional to 141,904.94, 212,616.54 and 85,626.80

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Solution

The fourth proportional to 141,904.94, 212,616.54 and 85,626.80 is: 128,294.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,904.94 : 212,616.54 = 85,626.80 : x
  2. Step 2: Convert to fraction form
    141,904.94/212,616.54 = 85,626.80/x
  3. Step 3: Cross multiply
    141,904.94x = 212,616.54 × 85,626.80
  4. Step 4: Simplify right side
    141,904.94x = 18,205,672,884.19
  5. Step 5: Solve for x
    x = 18,205,672,884.19/141,904.94
  6. Step 6: Final answer
    x = 128,294.85

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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.