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Finding the Fourth Proportional to 70,335.27, 105,513.29 and 20,408.88

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Solution

The fourth proportional to 70,335.27, 105,513.29 and 20,408.88 is: 30,616.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,335.27 : 105,513.29 = 20,408.88 : x
  2. Step 2: Convert to fraction form
    70,335.27/105,513.29 = 20,408.88/x
  3. Step 3: Cross multiply
    70,335.27x = 105,513.29 × 20,408.88
  4. Step 4: Simplify right side
    70,335.27x = 2,153,408,087.58
  5. Step 5: Solve for x
    x = 2,153,408,087.58/70,335.27
  6. Step 6: Final answer
    x = 30,616.33

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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.