Home / 260,060.20-390,129.08-80,130.58

Finding the Fourth Proportional to 260,060.20, 390,129.08 and 80,130.58

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Solution

The fourth proportional to 260,060.20, 390,129.08 and 80,130.58 is: 120,207.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,060.20 : 390,129.08 = 80,130.58 : x
  2. Step 2: Convert to fraction form
    260,060.20/390,129.08 = 80,130.58/x
  3. Step 3: Cross multiply
    260,060.20x = 390,129.08 × 80,130.58
  4. Step 4: Simplify right side
    260,060.20x = 31,261,269,455.27
  5. Step 5: Solve for x
    x = 31,261,269,455.27/260,060.20
  6. Step 6: Final answer
    x = 120,207.82

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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.