Home / 142,980.39-197,336.60-79,338.69

Finding the Fourth Proportional to 142,980.39, 197,336.60 and 79,338.69

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Solution

The fourth proportional to 142,980.39, 197,336.60 and 79,338.69 is: 109,500.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,980.39 : 197,336.60 = 79,338.69 : x
  2. Step 2: Convert to fraction form
    142,980.39/197,336.60 = 79,338.69/x
  3. Step 3: Cross multiply
    142,980.39x = 197,336.60 × 79,338.69
  4. Step 4: Simplify right side
    142,980.39x = 15,656,427,333.05
  5. Step 5: Solve for x
    x = 15,656,427,333.05/142,980.39
  6. Step 6: Final answer
    x = 109,500.52

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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.