Home / 268,587.28-402,268.20-128,445.04

Finding the Fourth Proportional to 268,587.28, 402,268.20 and 128,445.04

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Solution

The fourth proportional to 268,587.28, 402,268.20 and 128,445.04 is: 192,374.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,587.28 : 402,268.20 = 128,445.04 : x
  2. Step 2: Convert to fraction form
    268,587.28/402,268.20 = 128,445.04/x
  3. Step 3: Cross multiply
    268,587.28x = 402,268.20 × 128,445.04
  4. Step 4: Simplify right side
    268,587.28x = 51,669,355,039.73
  5. Step 5: Solve for x
    x = 51,669,355,039.73/268,587.28
  6. Step 6: Final answer
    x = 192,374.54

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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.