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Finding the Fourth Proportional to 119,690.34, 165,111.99 and 91,346.82

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Solution

The fourth proportional to 119,690.34, 165,111.99 and 91,346.82 is: 126,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,690.34 : 165,111.99 = 91,346.82 : x
  2. Step 2: Convert to fraction form
    119,690.34/165,111.99 = 91,346.82/x
  3. Step 3: Cross multiply
    119,690.34x = 165,111.99 × 91,346.82
  4. Step 4: Simplify right side
    119,690.34x = 15,082,455,230.37
  5. Step 5: Solve for x
    x = 15,082,455,230.37/119,690.34
  6. Step 6: Final answer
    x = 126,012.30

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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.