Home / 136,665.11-188,539.72-85,643.12

Finding the Fourth Proportional to 136,665.11, 188,539.72 and 85,643.12

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Solution

The fourth proportional to 136,665.11, 188,539.72 and 85,643.12 is: 118,151.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,665.11 : 188,539.72 = 85,643.12 : x
  2. Step 2: Convert to fraction form
    136,665.11/188,539.72 = 85,643.12/x
  3. Step 3: Cross multiply
    136,665.11x = 188,539.72 × 85,643.12
  4. Step 4: Simplify right side
    136,665.11x = 16,147,129,864.73
  5. Step 5: Solve for x
    x = 16,147,129,864.73/136,665.11
  6. Step 6: Final answer
    x = 118,151.08

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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.