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Finding the Fourth Proportional to 290,047.80, 435,021.48 and 79,636.53

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Solution

The fourth proportional to 290,047.80, 435,021.48 and 79,636.53 is: 119,441.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,047.80 : 435,021.48 = 79,636.53 : x
  2. Step 2: Convert to fraction form
    290,047.80/435,021.48 = 79,636.53/x
  3. Step 3: Cross multiply
    290,047.80x = 435,021.48 × 79,636.53
  4. Step 4: Simplify right side
    290,047.80x = 34,643,601,142.66
  5. Step 5: Solve for x
    x = 34,643,601,142.66/290,047.80
  6. Step 6: Final answer
    x = 119,441.01

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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.