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Finding the Fourth Proportional to 70,606.50, 105,960.72 and 40,984.80

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Solution

The fourth proportional to 70,606.50, 105,960.72 and 40,984.80 is: 61,506.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,606.50 : 105,960.72 = 40,984.80 : x
  2. Step 2: Convert to fraction form
    70,606.50/105,960.72 = 40,984.80/x
  3. Step 3: Cross multiply
    70,606.50x = 105,960.72 × 40,984.80
  4. Step 4: Simplify right side
    70,606.50x = 4,342,778,917.06
  5. Step 5: Solve for x
    x = 4,342,778,917.06/70,606.50
  6. Step 6: Final answer
    x = 61,506.79

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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.