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Finding the Fourth Proportional to 67,117.60, 100,676.40 and 20,370.40

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Solution

The fourth proportional to 67,117.60, 100,676.40 and 20,370.40 is: 30,555.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,117.60 : 100,676.40 = 20,370.40 : x
  2. Step 2: Convert to fraction form
    67,117.60/100,676.40 = 20,370.40/x
  3. Step 3: Cross multiply
    67,117.60x = 100,676.40 × 20,370.40
  4. Step 4: Simplify right side
    67,117.60x = 2,050,818,538.56
  5. Step 5: Solve for x
    x = 2,050,818,538.56/67,117.60
  6. Step 6: Final answer
    x = 30,555.60

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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.