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Finding the Fourth Proportional to 117,771.52, 162,549.82 and 72,449.58

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Solution

The fourth proportional to 117,771.52, 162,549.82 and 72,449.58 is: 99,995.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,771.52 : 162,549.82 = 72,449.58 : x
  2. Step 2: Convert to fraction form
    117,771.52/162,549.82 = 72,449.58/x
  3. Step 3: Cross multiply
    117,771.52x = 162,549.82 × 72,449.58
  4. Step 4: Simplify right side
    117,771.52x = 11,776,666,188.08
  5. Step 5: Solve for x
    x = 11,776,666,188.08/117,771.52
  6. Step 6: Final answer
    x = 99,995.87

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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.