Home / 260,087.40-390,131.10-135,412.20

Finding the Fourth Proportional to 260,087.40, 390,131.10 and 135,412.20

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Solution

The fourth proportional to 260,087.40, 390,131.10 and 135,412.20 is: 203,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,087.40 : 390,131.10 = 135,412.20 : x
  2. Step 2: Convert to fraction form
    260,087.40/390,131.10 = 135,412.20/x
  3. Step 3: Cross multiply
    260,087.40x = 390,131.10 × 135,412.20
  4. Step 4: Simplify right side
    260,087.40x = 52,828,510,539.42
  5. Step 5: Solve for x
    x = 52,828,510,539.42/260,087.40
  6. Step 6: Final answer
    x = 203,118.30

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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.