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Finding the Fourth Proportional to 70,352.39, 105,528.68 and 20,432.63

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Solution

The fourth proportional to 70,352.39, 105,528.68 and 20,432.63 is: 30,648.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,352.39 : 105,528.68 = 20,432.63 : x
  2. Step 2: Convert to fraction form
    70,352.39/105,528.68 = 20,432.63/x
  3. Step 3: Cross multiply
    70,352.39x = 105,528.68 × 20,432.63
  4. Step 4: Simplify right side
    70,352.39x = 2,156,227,843.02
  5. Step 5: Solve for x
    x = 2,156,227,843.02/70,352.39
  6. Step 6: Final answer
    x = 30,648.97

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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.