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Finding the Fourth Proportional to 82,709.40, 124,076.41 and 38,340.64

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Solution

The fourth proportional to 82,709.40, 124,076.41 and 38,340.64 is: 57,516.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,709.40 : 124,076.41 = 38,340.64 : x
  2. Step 2: Convert to fraction form
    82,709.40/124,076.41 = 38,340.64/x
  3. Step 3: Cross multiply
    82,709.40x = 124,076.41 × 38,340.64
  4. Step 4: Simplify right side
    82,709.40x = 4,757,169,027.55
  5. Step 5: Solve for x
    x = 4,757,169,027.55/82,709.40
  6. Step 6: Final answer
    x = 57,516.66

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1.5x scale

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.