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Finding the Fourth Proportional to 260,071.20, 390,106.80 and 166,759.20

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Solution

The fourth proportional to 260,071.20, 390,106.80 and 166,759.20 is: 250,138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,071.20 : 390,106.80 = 166,759.20 : x
  2. Step 2: Convert to fraction form
    260,071.20/390,106.80 = 166,759.20/x
  3. Step 3: Cross multiply
    260,071.20x = 390,106.80 × 166,759.20
  4. Step 4: Simplify right side
    260,071.20x = 65,053,897,882.56
  5. Step 5: Solve for x
    x = 65,053,897,882.56/260,071.20
  6. Step 6: Final answer
    x = 250,138.80

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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.