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Finding the Fourth Proportional to 141,387.40, 212,081.10 and 71,403.40

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Solution

The fourth proportional to 141,387.40, 212,081.10 and 71,403.40 is: 107,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,387.40 : 212,081.10 = 71,403.40 : x
  2. Step 2: Convert to fraction form
    141,387.40/212,081.10 = 71,403.40/x
  3. Step 3: Cross multiply
    141,387.40x = 212,081.10 × 71,403.40
  4. Step 4: Simplify right side
    141,387.40x = 15,143,311,615.74
  5. Step 5: Solve for x
    x = 15,143,311,615.74/141,387.40
  6. Step 6: Final answer
    x = 107,105.10

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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.