Home / 260,070.72-389,943.12-102,115.68

Finding the Fourth Proportional to 260,070.72, 389,943.12 and 102,115.68

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Solution

The fourth proportional to 260,070.72, 389,943.12 and 102,115.68 is: 153,109.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,070.72 : 389,943.12 = 102,115.68 : x
  2. Step 2: Convert to fraction form
    260,070.72/389,943.12 = 102,115.68/x
  3. Step 3: Cross multiply
    260,070.72x = 389,943.12 × 102,115.68
  4. Step 4: Simplify right side
    260,070.72x = 39,819,306,860.12
  5. Step 5: Solve for x
    x = 39,819,306,860.12/260,070.72
  6. Step 6: Final answer
    x = 153,109.53

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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.