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Finding the Fourth Proportional to 70,021.38, 105,078.78 and 36,318.46

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Solution

The fourth proportional to 70,021.38, 105,078.78 and 36,318.46 is: 54,501.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,021.38 : 105,078.78 = 36,318.46 : x
  2. Step 2: Convert to fraction form
    70,021.38/105,078.78 = 36,318.46/x
  3. Step 3: Cross multiply
    70,021.38x = 105,078.78 × 36,318.46
  4. Step 4: Simplify right side
    70,021.38x = 3,816,299,468.28
  5. Step 5: Solve for x
    x = 3,816,299,468.28/70,021.38
  6. Step 6: Final answer
    x = 54,501.92

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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.