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Finding the Fourth Proportional to 70,910.50, 97,855.20 and 38,645.40

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Solution

The fourth proportional to 70,910.50, 97,855.20 and 38,645.40 is: 53,329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,910.50 : 97,855.20 = 38,645.40 : x
  2. Step 2: Convert to fraction form
    70,910.50/97,855.20 = 38,645.40/x
  3. Step 3: Cross multiply
    70,910.50x = 97,855.20 × 38,645.40
  4. Step 4: Simplify right side
    70,910.50x = 3,781,653,346.08
  5. Step 5: Solve for x
    x = 3,781,653,346.08/70,910.50
  6. Step 6: Final answer
    x = 53,329.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.