Home / 259,991.40-389,987.10-135,316.20

Finding the Fourth Proportional to 259,991.40, 389,987.10 and 135,316.20

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Solution

The fourth proportional to 259,991.40, 389,987.10 and 135,316.20 is: 202,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,991.40 : 389,987.10 = 135,316.20 : x
  2. Step 2: Convert to fraction form
    259,991.40/389,987.10 = 135,316.20/x
  3. Step 3: Cross multiply
    259,991.40x = 389,987.10 × 135,316.20
  4. Step 4: Simplify right side
    259,991.40x = 52,771,572,421.02
  5. Step 5: Solve for x
    x = 52,771,572,421.02/259,991.40
  6. Step 6: Final answer
    x = 202,974.30

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Similar ratio
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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.