Home / 142,284.40-196,344.76-78,618.09

Finding the Fourth Proportional to 142,284.40, 196,344.76 and 78,618.09

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Solution

The fourth proportional to 142,284.40, 196,344.76 and 78,618.09 is: 108,488.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,284.40 : 196,344.76 = 78,618.09 : x
  2. Step 2: Convert to fraction form
    142,284.40/196,344.76 = 78,618.09/x
  3. Step 3: Cross multiply
    142,284.40x = 196,344.76 × 78,618.09
  4. Step 4: Simplify right side
    142,284.40x = 15,436,250,699.86
  5. Step 5: Solve for x
    x = 15,436,250,699.86/142,284.40
  6. Step 6: Final answer
    x = 108,488.71

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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.