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Finding the Fourth Proportional to 71,816.61, 108,262.72 and 66,999.75

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Solution

The fourth proportional to 71,816.61, 108,262.72 and 66,999.75 is: 101,001.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,816.61 : 108,262.72 = 66,999.75 : x
  2. Step 2: Convert to fraction form
    71,816.61/108,262.72 = 66,999.75/x
  3. Step 3: Cross multiply
    71,816.61x = 108,262.72 × 66,999.75
  4. Step 4: Simplify right side
    71,816.61x = 7,253,575,174.32
  5. Step 5: Solve for x
    x = 7,253,575,174.32/71,816.61
  6. Step 6: Final answer
    x = 101,001.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.