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Finding the Fourth Proportional to 70,517.15, 105,948.53 and 53,021.15

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Solution

The fourth proportional to 70,517.15, 105,948.53 and 53,021.15 is: 79,661.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,517.15 : 105,948.53 = 53,021.15 : x
  2. Step 2: Convert to fraction form
    70,517.15/105,948.53 = 53,021.15/x
  3. Step 3: Cross multiply
    70,517.15x = 105,948.53 × 53,021.15
  4. Step 4: Simplify right side
    70,517.15x = 5,617,512,636.30
  5. Step 5: Solve for x
    x = 5,617,512,636.30/70,517.15
  6. Step 6: Final answer
    x = 79,661.65

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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.