Home / 138,840.78-208,269.24-39,008.75

Finding the Fourth Proportional to 138,840.78, 208,269.24 and 39,008.75

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Solution

The fourth proportional to 138,840.78, 208,269.24 and 39,008.75 is: 58,515.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,840.78 : 208,269.24 = 39,008.75 : x
  2. Step 2: Convert to fraction form
    138,840.78/208,269.24 = 39,008.75/x
  3. Step 3: Cross multiply
    138,840.78x = 208,269.24 × 39,008.75
  4. Step 4: Simplify right side
    138,840.78x = 8,124,322,715.85
  5. Step 5: Solve for x
    x = 8,124,322,715.85/138,840.78
  6. Step 6: Final answer
    x = 58,515.39

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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.