Home / 117,129.12-161,631.63-66,138.54

Finding the Fourth Proportional to 117,129.12, 161,631.63 and 66,138.54

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Solution

The fourth proportional to 117,129.12, 161,631.63 and 66,138.54 is: 91,267.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.12 : 161,631.63 = 66,138.54 : x
  2. Step 2: Convert to fraction form
    117,129.12/161,631.63 = 66,138.54/x
  3. Step 3: Cross multiply
    117,129.12x = 161,631.63 × 66,138.54
  4. Step 4: Simplify right side
    117,129.12x = 10,690,080,026.02
  5. Step 5: Solve for x
    x = 10,690,080,026.02/117,129.12
  6. Step 6: Final answer
    x = 91,267.48

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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.