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Finding the Fourth Proportional to 70,951.75, 97,913.02 and 39,120.65

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Solution

The fourth proportional to 70,951.75, 97,913.02 and 39,120.65 is: 53,986.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,951.75 : 97,913.02 = 39,120.65 : x
  2. Step 2: Convert to fraction form
    70,951.75/97,913.02 = 39,120.65/x
  3. Step 3: Cross multiply
    70,951.75x = 97,913.02 × 39,120.65
  4. Step 4: Simplify right side
    70,951.75x = 3,830,420,398.60
  5. Step 5: Solve for x
    x = 3,830,420,398.60/70,951.75
  6. Step 6: Final answer
    x = 53,986.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.