Home / 142,841.34-197,115.39-78,309.18

Finding the Fourth Proportional to 142,841.34, 197,115.39 and 78,309.18

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Solution

The fourth proportional to 142,841.34, 197,115.39 and 78,309.18 is: 108,063.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,841.34 : 197,115.39 = 78,309.18 : x
  2. Step 2: Convert to fraction form
    142,841.34/197,115.39 = 78,309.18/x
  3. Step 3: Cross multiply
    142,841.34x = 197,115.39 × 78,309.18
  4. Step 4: Simplify right side
    142,841.34x = 15,435,944,556.28
  5. Step 5: Solve for x
    x = 15,435,944,556.28/142,841.34
  6. Step 6: Final answer
    x = 108,063.57

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1.5x scale

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.