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Finding the Fourth Proportional to 290,092.81, 435,128.28 and 79,725.28

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Solution

The fourth proportional to 290,092.81, 435,128.28 and 79,725.28 is: 119,584.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,092.81 : 435,128.28 = 79,725.28 : x
  2. Step 2: Convert to fraction form
    290,092.81/435,128.28 = 79,725.28/x
  3. Step 3: Cross multiply
    290,092.81x = 435,128.28 × 79,725.28
  4. Step 4: Simplify right side
    290,092.81x = 34,690,723,958.92
  5. Step 5: Solve for x
    x = 34,690,723,958.92/290,092.81
  6. Step 6: Final answer
    x = 119,584.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.