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Finding the Fourth Proportional to 290,091.81, 435,126.78 and 79,724.28

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Solution

The fourth proportional to 290,091.81, 435,126.78 and 79,724.28 is: 119,583.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,091.81 : 435,126.78 = 79,724.28 : x
  2. Step 2: Convert to fraction form
    290,091.81/435,126.78 = 79,724.28/x
  3. Step 3: Cross multiply
    290,091.81x = 435,126.78 × 79,724.28
  4. Step 4: Simplify right side
    290,091.81x = 34,690,169,244.22
  5. Step 5: Solve for x
    x = 34,690,169,244.22/290,091.81
  6. Step 6: Final answer
    x = 119,583.41

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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.