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Finding the Fourth Proportional to 117,170.80, 161,698.66 and 71,873.76

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Solution

The fourth proportional to 117,170.80, 161,698.66 and 71,873.76 is: 99,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,170.80 : 161,698.66 = 71,873.76 : x
  2. Step 2: Convert to fraction form
    117,170.80/161,698.66 = 71,873.76/x
  3. Step 3: Cross multiply
    117,170.80x = 161,698.66 × 71,873.76
  4. Step 4: Simplify right side
    117,170.80x = 11,621,890,681.16
  5. Step 5: Solve for x
    x = 11,621,890,681.16/117,170.80
  6. Step 6: Final answer
    x = 99,187.60

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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.