Home / 145,193-199,744.26-138,972.20

Finding the Fourth Proportional to 145,193, 199,744.26 and 138,972.20

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Solution

The fourth proportional to 145,193, 199,744.26 and 138,972.20 is: 191,186.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,193 : 199,744.26 = 138,972.20 : x
  2. Step 2: Convert to fraction form
    145,193/199,744.26 = 138,972.20/x
  3. Step 3: Cross multiply
    145,193x = 199,744.26 × 138,972.20
  4. Step 4: Simplify right side
    145,193x = 27,758,899,249.57
  5. Step 5: Solve for x
    x = 27,758,899,249.57/145,193
  6. Step 6: Final answer
    x = 191,186.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.