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Finding the Fourth Proportional to 70,600.50, 105,910.65 and 20,684.16

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Solution

The fourth proportional to 70,600.50, 105,910.65 and 20,684.16 is: 31,029.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,600.50 : 105,910.65 = 20,684.16 : x
  2. Step 2: Convert to fraction form
    70,600.50/105,910.65 = 20,684.16/x
  3. Step 3: Cross multiply
    70,600.50x = 105,910.65 × 20,684.16
  4. Step 4: Simplify right side
    70,600.50x = 2,190,672,830.30
  5. Step 5: Solve for x
    x = 2,190,672,830.30/70,600.50
  6. Step 6: Final answer
    x = 31,029.14

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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.