Home / 142,005.74-211,845.68-138,144.78

Finding the Fourth Proportional to 142,005.74, 211,845.68 and 138,144.78

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Solution

The fourth proportional to 142,005.74, 211,845.68 and 138,144.78 is: 206,085.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,005.74 : 211,845.68 = 138,144.78 : x
  2. Step 2: Convert to fraction form
    142,005.74/211,845.68 = 138,144.78/x
  3. Step 3: Cross multiply
    142,005.74x = 211,845.68 × 138,144.78
  4. Step 4: Simplify right side
    142,005.74x = 29,265,374,857.55
  5. Step 5: Solve for x
    x = 29,265,374,857.55/142,005.74
  6. Step 6: Final answer
    x = 206,085.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.