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Finding the Fourth Proportional to 260,116.71, 390,176.68 and 80,199.71

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Solution

The fourth proportional to 260,116.71, 390,176.68 and 80,199.71 is: 120,300.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,116.71 : 390,176.68 = 80,199.71 : x
  2. Step 2: Convert to fraction form
    260,116.71/390,176.68 = 80,199.71/x
  3. Step 3: Cross multiply
    260,116.71x = 390,176.68 × 80,199.71
  4. Step 4: Simplify right side
    260,116.71x = 31,292,056,584.76
  5. Step 5: Solve for x
    x = 31,292,056,584.76/260,116.71
  6. Step 6: Final answer
    x = 120,300.06

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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.