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Finding the Fourth Proportional to 70,318.67, 105,495.21 and 20,397.69

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Solution

The fourth proportional to 70,318.67, 105,495.21 and 20,397.69 is: 30,601.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,318.67 : 105,495.21 = 20,397.69 : x
  2. Step 2: Convert to fraction form
    70,318.67/105,495.21 = 20,397.69/x
  3. Step 3: Cross multiply
    70,318.67x = 105,495.21 × 20,397.69
  4. Step 4: Simplify right side
    70,318.67x = 2,151,858,590.06
  5. Step 5: Solve for x
    x = 2,151,858,590.06/70,318.67
  6. Step 6: Final answer
    x = 30,601.53

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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.