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Finding the Fourth Proportional to 141,993.10, 212,989.65 and 42,168.70

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Solution

The fourth proportional to 141,993.10, 212,989.65 and 42,168.70 is: 63,253.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,993.10 : 212,989.65 = 42,168.70 : x
  2. Step 2: Convert to fraction form
    141,993.10/212,989.65 = 42,168.70/x
  3. Step 3: Cross multiply
    141,993.10x = 212,989.65 × 42,168.70
  4. Step 4: Simplify right side
    141,993.10x = 8,981,496,653.96
  5. Step 5: Solve for x
    x = 8,981,496,653.96/141,993.10
  6. Step 6: Final answer
    x = 63,253.05

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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.