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Finding the Fourth Proportional to 71,975.48, 99,250.80 and 61,937.96

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Solution

The fourth proportional to 71,975.48, 99,250.80 and 61,937.96 is: 85,409.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,975.48 : 99,250.80 = 61,937.96 : x
  2. Step 2: Convert to fraction form
    71,975.48/99,250.80 = 61,937.96/x
  3. Step 3: Cross multiply
    71,975.48x = 99,250.80 × 61,937.96
  4. Step 4: Simplify right side
    71,975.48x = 6,147,392,080.37
  5. Step 5: Solve for x
    x = 6,147,392,080.37/71,975.48
  6. Step 6: Final answer
    x = 85,409.53

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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.