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Finding the Fourth Proportional to 70,913.52, 97,991.10 and 51,760.80

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Solution

The fourth proportional to 70,913.52, 97,991.10 and 51,760.80 is: 71,525.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,913.52 : 97,991.10 = 51,760.80 : x
  2. Step 2: Convert to fraction form
    70,913.52/97,991.10 = 51,760.80/x
  3. Step 3: Cross multiply
    70,913.52x = 97,991.10 × 51,760.80
  4. Step 4: Simplify right side
    70,913.52x = 5,072,097,728.88
  5. Step 5: Solve for x
    x = 5,072,097,728.88/70,913.52
  6. Step 6: Final answer
    x = 71,525.12

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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.