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Finding the Fourth Proportional to 242,287.70, 363,431.55 and 142,495.70

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Solution

The fourth proportional to 242,287.70, 363,431.55 and 142,495.70 is: 213,743.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,287.70 : 363,431.55 = 142,495.70 : x
  2. Step 2: Convert to fraction form
    242,287.70/363,431.55 = 142,495.70/x
  3. Step 3: Cross multiply
    242,287.70x = 363,431.55 × 142,495.70
  4. Step 4: Simplify right side
    242,287.70x = 51,787,433,119.34
  5. Step 5: Solve for x
    x = 51,787,433,119.34/242,287.70
  6. Step 6: Final answer
    x = 213,743.55

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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.