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Finding the Fourth Proportional to 290,695.11, 401,123.18 and 168,208.53

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Solution

The fourth proportional to 290,695.11, 401,123.18 and 168,208.53 is: 232,106.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,695.11 : 401,123.18 = 168,208.53 : x
  2. Step 2: Convert to fraction form
    290,695.11/401,123.18 = 168,208.53/x
  3. Step 3: Cross multiply
    290,695.11x = 401,123.18 × 168,208.53
  4. Step 4: Simplify right side
    290,695.11x = 67,472,339,615.68
  5. Step 5: Solve for x
    x = 67,472,339,615.68/290,695.11
  6. Step 6: Final answer
    x = 232,106.90

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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.