Home / 260,078.40-390,117.60-135,403.20

Finding the Fourth Proportional to 260,078.40, 390,117.60 and 135,403.20

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Solution

The fourth proportional to 260,078.40, 390,117.60 and 135,403.20 is: 203,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,078.40 : 390,117.60 = 135,403.20 : x
  2. Step 2: Convert to fraction form
    260,078.40/390,117.60 = 135,403.20/x
  3. Step 3: Cross multiply
    260,078.40x = 390,117.60 × 135,403.20
  4. Step 4: Simplify right side
    260,078.40x = 52,823,171,416.32
  5. Step 5: Solve for x
    x = 52,823,171,416.32/260,078.40
  6. Step 6: Final answer
    x = 203,104.80

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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.