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Finding the Fourth Proportional to 138,745.69, 208,118.53 and 45,251.44

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Solution

The fourth proportional to 138,745.69, 208,118.53 and 45,251.44 is: 67,877.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,745.69 : 208,118.53 = 45,251.44 : x
  2. Step 2: Convert to fraction form
    138,745.69/208,118.53 = 45,251.44/x
  3. Step 3: Cross multiply
    138,745.69x = 208,118.53 × 45,251.44
  4. Step 4: Simplify right side
    138,745.69x = 9,417,662,709.45
  5. Step 5: Solve for x
    x = 9,417,662,709.45/138,745.69
  6. Step 6: Final answer
    x = 67,877.16

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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.