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Finding the Fourth Proportional to 117,374.15, 161,983.17 and 66,391.40

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Solution

The fourth proportional to 117,374.15, 161,983.17 and 66,391.40 is: 91,624.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,374.15 : 161,983.17 = 66,391.40 : x
  2. Step 2: Convert to fraction form
    117,374.15/161,983.17 = 66,391.40/x
  3. Step 3: Cross multiply
    117,374.15x = 161,983.17 × 66,391.40
  4. Step 4: Simplify right side
    117,374.15x = 10,754,288,622.82
  5. Step 5: Solve for x
    x = 10,754,288,622.82/117,374.15
  6. Step 6: Final answer
    x = 91,624.00

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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.