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Finding the Fourth Proportional to 85,487.52, 128,246.04 and 38,119.44

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Solution

The fourth proportional to 85,487.52, 128,246.04 and 38,119.44 is: 57,185.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,487.52 : 128,246.04 = 38,119.44 : x
  2. Step 2: Convert to fraction form
    85,487.52/128,246.04 = 38,119.44/x
  3. Step 3: Cross multiply
    85,487.52x = 128,246.04 × 38,119.44
  4. Step 4: Simplify right side
    85,487.52x = 4,888,667,227.02
  5. Step 5: Solve for x
    x = 4,888,667,227.02/85,487.52
  6. Step 6: Final answer
    x = 57,185.74

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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.