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Finding the Fourth Proportional to 117,387.99, 161,998.20 and 71,431.83

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Solution

The fourth proportional to 117,387.99, 161,998.20 and 71,431.83 is: 98,577.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,387.99 : 161,998.20 = 71,431.83 : x
  2. Step 2: Convert to fraction form
    117,387.99/161,998.20 = 71,431.83/x
  3. Step 3: Cross multiply
    117,387.99x = 161,998.20 × 71,431.83
  4. Step 4: Simplify right side
    117,387.99x = 11,571,827,882.71
  5. Step 5: Solve for x
    x = 11,571,827,882.71/117,387.99
  6. Step 6: Final answer
    x = 98,577.61

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1.5x scale

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.