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Finding the Fourth Proportional to 260,105.40, 390,168.90 and 82,607.40

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Solution

The fourth proportional to 260,105.40, 390,168.90 and 82,607.40 is: 123,914.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,105.40 : 390,168.90 = 82,607.40 : x
  2. Step 2: Convert to fraction form
    260,105.40/390,168.90 = 82,607.40/x
  3. Step 3: Cross multiply
    260,105.40x = 390,168.90 × 82,607.40
  4. Step 4: Simplify right side
    260,105.40x = 32,230,838,389.86
  5. Step 5: Solve for x
    x = 32,230,838,389.86/260,105.40
  6. Step 6: Final answer
    x = 123,914.53

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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.