Home / 259,411.20-389,118.24-72,424.32

Finding the Fourth Proportional to 259,411.20, 389,118.24 and 72,424.32

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Solution

The fourth proportional to 259,411.20, 389,118.24 and 72,424.32 is: 108,636.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,411.20 : 389,118.24 = 72,424.32 : x
  2. Step 2: Convert to fraction form
    259,411.20/389,118.24 = 72,424.32/x
  3. Step 3: Cross multiply
    259,411.20x = 389,118.24 × 72,424.32
  4. Step 4: Simplify right side
    259,411.20x = 28,181,623,931.60
  5. Step 5: Solve for x
    x = 28,181,623,931.60/259,411.20
  6. Step 6: Final answer
    x = 108,636.88

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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.