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Finding the Fourth Proportional to 70,863.60, 106,306.86 and 20,948.70

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Solution

The fourth proportional to 70,863.60, 106,306.86 and 20,948.70 is: 31,426.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,863.60 : 106,306.86 = 20,948.70 : x
  2. Step 2: Convert to fraction form
    70,863.60/106,306.86 = 20,948.70/x
  3. Step 3: Cross multiply
    70,863.60x = 106,306.86 × 20,948.70
  4. Step 4: Simplify right side
    70,863.60x = 2,226,990,518.08
  5. Step 5: Solve for x
    x = 2,226,990,518.08/70,863.60
  6. Step 6: Final answer
    x = 31,426.44

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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.