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Finding the Fourth Proportional to 70,655.54, 105,994.85 and 20,737.26

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Solution

The fourth proportional to 70,655.54, 105,994.85 and 20,737.26 is: 31,109.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,655.54 : 105,994.85 = 20,737.26 : x
  2. Step 2: Convert to fraction form
    70,655.54/105,994.85 = 20,737.26/x
  3. Step 3: Cross multiply
    70,655.54x = 105,994.85 × 20,737.26
  4. Step 4: Simplify right side
    70,655.54x = 2,198,042,659.42
  5. Step 5: Solve for x
    x = 2,198,042,659.42/70,655.54
  6. Step 6: Final answer
    x = 31,109.28

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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.