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Finding the Fourth Proportional to 260,118.40, 390,080.40 and 102,314.20

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Solution

The fourth proportional to 260,118.40, 390,080.40 and 102,314.20 is: 153,433.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,118.40 : 390,080.40 = 102,314.20 : x
  2. Step 2: Convert to fraction form
    260,118.40/390,080.40 = 102,314.20/x
  3. Step 3: Cross multiply
    260,118.40x = 390,080.40 × 102,314.20
  4. Step 4: Simplify right side
    260,118.40x = 39,910,764,061.68
  5. Step 5: Solve for x
    x = 39,910,764,061.68/260,118.40
  6. Step 6: Final answer
    x = 153,433.07

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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.