Home / 260,156.11-390,276.25-80,199.44

Finding the Fourth Proportional to 260,156.11, 390,276.25 and 80,199.44

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Solution

The fourth proportional to 260,156.11, 390,276.25 and 80,199.44 is: 120,312.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,156.11 : 390,276.25 = 80,199.44 : x
  2. Step 2: Convert to fraction form
    260,156.11/390,276.25 = 80,199.44/x
  3. Step 3: Cross multiply
    260,156.11x = 390,276.25 × 80,199.44
  4. Step 4: Simplify right side
    260,156.11x = 31,299,935,201.38
  5. Step 5: Solve for x
    x = 31,299,935,201.38/260,156.11
  6. Step 6: Final answer
    x = 120,312.13

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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.