Home / 260,122.20-390,214.58-91,607.72

Finding the Fourth Proportional to 260,122.20, 390,214.58 and 91,607.72

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Solution

The fourth proportional to 260,122.20, 390,214.58 and 91,607.72 is: 137,422.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,122.20 : 390,214.58 = 91,607.72 : x
  2. Step 2: Convert to fraction form
    260,122.20/390,214.58 = 91,607.72/x
  3. Step 3: Cross multiply
    260,122.20x = 390,214.58 × 91,607.72
  4. Step 4: Simplify right side
    260,122.20x = 35,746,665,575.45
  5. Step 5: Solve for x
    x = 35,746,665,575.45/260,122.20
  6. Step 6: Final answer
    x = 137,422.59

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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.