Home / 259,468.20-389,214.45-81,989.10

Finding the Fourth Proportional to 259,468.20, 389,214.45 and 81,989.10

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Solution

The fourth proportional to 259,468.20, 389,214.45 and 81,989.10 is: 122,987.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,468.20 : 389,214.45 = 81,989.10 : x
  2. Step 2: Convert to fraction form
    259,468.20/389,214.45 = 81,989.10/x
  3. Step 3: Cross multiply
    259,468.20x = 389,214.45 × 81,989.10
  4. Step 4: Simplify right side
    259,468.20x = 31,911,342,462.50
  5. Step 5: Solve for x
    x = 31,911,342,462.50/259,468.20
  6. Step 6: Final answer
    x = 122,987.49

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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.