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Finding the Fourth Proportional to 70,332.15, 105,481.67 and 20,399.07

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Solution

The fourth proportional to 70,332.15, 105,481.67 and 20,399.07 is: 30,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,332.15 : 105,481.67 = 20,399.07 : x
  2. Step 2: Convert to fraction form
    70,332.15/105,481.67 = 20,399.07/x
  3. Step 3: Cross multiply
    70,332.15x = 105,481.67 × 20,399.07
  4. Step 4: Simplify right side
    70,332.15x = 2,151,727,868.05
  5. Step 5: Solve for x
    x = 2,151,727,868.05/70,332.15
  6. Step 6: Final answer
    x = 30,593.80

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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.