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Finding the Fourth Proportional to 141,521.92, 212,107.92 and 71,421.28

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Solution

The fourth proportional to 141,521.92, 212,107.92 and 71,421.28 is: 107,043.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,521.92 : 212,107.92 = 71,421.28 : x
  2. Step 2: Convert to fraction form
    141,521.92/212,107.92 = 71,421.28/x
  3. Step 3: Cross multiply
    141,521.92x = 212,107.92 × 71,421.28
  4. Step 4: Simplify right side
    141,521.92x = 15,149,019,144.54
  5. Step 5: Solve for x
    x = 15,149,019,144.54/141,521.92
  6. Step 6: Final answer
    x = 107,043.62

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1.5x scale

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.