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Finding the Fourth Proportional to 210,489.08, 290,435.36 and 119,839.55

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Solution

The fourth proportional to 210,489.08, 290,435.36 and 119,839.55 is: 165,356.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,489.08 : 290,435.36 = 119,839.55 : x
  2. Step 2: Convert to fraction form
    210,489.08/290,435.36 = 119,839.55/x
  3. Step 3: Cross multiply
    210,489.08x = 290,435.36 × 119,839.55
  4. Step 4: Simplify right side
    210,489.08x = 34,805,640,795.11
  5. Step 5: Solve for x
    x = 34,805,640,795.11/210,489.08
  6. Step 6: Final answer
    x = 165,356.04

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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.