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Finding the Fourth Proportional to 70,951.54, 97,913.78 and 39,121.56

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Solution

The fourth proportional to 70,951.54, 97,913.78 and 39,121.56 is: 53,988.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,951.54 : 97,913.78 = 39,121.56 : x
  2. Step 2: Convert to fraction form
    70,951.54/97,913.78 = 39,121.56/x
  3. Step 3: Cross multiply
    70,951.54x = 97,913.78 × 39,121.56
  4. Step 4: Simplify right side
    70,951.54x = 3,830,539,819.10
  5. Step 5: Solve for x
    x = 3,830,539,819.10/70,951.54
  6. Step 6: Final answer
    x = 53,988.11

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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.