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Finding the Fourth Proportional to 260,023.12, 390,049.20 and 73,020

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Solution

The fourth proportional to 260,023.12, 390,049.20 and 73,020 is: 109,534.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,023.12 : 390,049.20 = 73,020 : x
  2. Step 2: Convert to fraction form
    260,023.12/390,049.20 = 73,020/x
  3. Step 3: Cross multiply
    260,023.12x = 390,049.20 × 73,020
  4. Step 4: Simplify right side
    260,023.12x = 28,481,392,584
  5. Step 5: Solve for x
    x = 28,481,392,584/260,023.12
  6. Step 6: Final answer
    x = 109,534.08

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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.