Home / 260,656.80-390,907.20-135,929.76

Finding the Fourth Proportional to 260,656.80, 390,907.20 and 135,929.76

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Solution

The fourth proportional to 260,656.80, 390,907.20 and 135,929.76 is: 203,853.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,656.80 : 390,907.20 = 135,929.76 : x
  2. Step 2: Convert to fraction form
    260,656.80/390,907.20 = 135,929.76/x
  3. Step 3: Cross multiply
    260,656.80x = 390,907.20 × 135,929.76
  4. Step 4: Simplify right side
    260,656.80x = 53,135,921,878.27
  5. Step 5: Solve for x
    x = 53,135,921,878.27/260,656.80
  6. Step 6: Final answer
    x = 203,853.96

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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.