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Finding the Fourth Proportional to 138,840.50, 208,268.82 and 39,008.48

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Solution

The fourth proportional to 138,840.50, 208,268.82 and 39,008.48 is: 58,514.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,840.50 : 208,268.82 = 39,008.48 : x
  2. Step 2: Convert to fraction form
    138,840.50/208,268.82 = 39,008.48/x
  3. Step 3: Cross multiply
    138,840.50x = 208,268.82 × 39,008.48
  4. Step 4: Simplify right side
    138,840.50x = 8,124,250,099.59
  5. Step 5: Solve for x
    x = 8,124,250,099.59/138,840.50
  6. Step 6: Final answer
    x = 58,514.99

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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.