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Finding the Fourth Proportional to 70,350.70, 105,531.52 and 20,431.62

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Solution

The fourth proportional to 70,350.70, 105,531.52 and 20,431.62 is: 30,649.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,350.70 : 105,531.52 = 20,431.62 : x
  2. Step 2: Convert to fraction form
    70,350.70/105,531.52 = 20,431.62/x
  3. Step 3: Cross multiply
    70,350.70x = 105,531.52 × 20,431.62
  4. Step 4: Simplify right side
    70,350.70x = 2,156,179,914.66
  5. Step 5: Solve for x
    x = 2,156,179,914.66/70,350.70
  6. Step 6: Final answer
    x = 30,649.02

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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.