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Finding the Fourth Proportional to 141,705.75, 212,344.38 and 85,483.38

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Solution

The fourth proportional to 141,705.75, 212,344.38 and 85,483.38 is: 128,095.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,705.75 : 212,344.38 = 85,483.38 : x
  2. Step 2: Convert to fraction form
    141,705.75/212,344.38 = 85,483.38/x
  3. Step 3: Cross multiply
    141,705.75x = 212,344.38 × 85,483.38
  4. Step 4: Simplify right side
    141,705.75x = 18,151,915,326.40
  5. Step 5: Solve for x
    x = 18,151,915,326.40/141,705.75
  6. Step 6: Final answer
    x = 128,095.83

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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.