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Finding the Fourth Proportional to 70,319.90, 105,451.46 and 25,936.79

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Solution

The fourth proportional to 70,319.90, 105,451.46 and 25,936.79 is: 38,894.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,319.90 : 105,451.46 = 25,936.79 : x
  2. Step 2: Convert to fraction form
    70,319.90/105,451.46 = 25,936.79/x
  3. Step 3: Cross multiply
    70,319.90x = 105,451.46 × 25,936.79
  4. Step 4: Simplify right side
    70,319.90x = 2,735,071,716.27
  5. Step 5: Solve for x
    x = 2,735,071,716.27/70,319.90
  6. Step 6: Final answer
    x = 38,894.71

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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.