Home / 142,758.28-196,989.60-82,328.68

Finding the Fourth Proportional to 142,758.28, 196,989.60 and 82,328.68

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Solution

The fourth proportional to 142,758.28, 196,989.60 and 82,328.68 is: 113,603.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,758.28 : 196,989.60 = 82,328.68 : x
  2. Step 2: Convert to fraction form
    142,758.28/196,989.60 = 82,328.68/x
  3. Step 3: Cross multiply
    142,758.28x = 196,989.60 × 82,328.68
  4. Step 4: Simplify right side
    142,758.28x = 16,217,893,741.73
  5. Step 5: Solve for x
    x = 16,217,893,741.73/142,758.28
  6. Step 6: Final answer
    x = 113,603.87

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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.