Home / 268,288.13-402,407.60-90,774.81

Finding the Fourth Proportional to 268,288.13, 402,407.60 and 90,774.81

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Solution

The fourth proportional to 268,288.13, 402,407.60 and 90,774.81 is: 136,153.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,288.13 : 402,407.60 = 90,774.81 : x
  2. Step 2: Convert to fraction form
    268,288.13/402,407.60 = 90,774.81/x
  3. Step 3: Cross multiply
    268,288.13x = 402,407.60 × 90,774.81
  4. Step 4: Simplify right side
    268,288.13x = 36,528,472,978.68
  5. Step 5: Solve for x
    x = 36,528,472,978.68/268,288.13
  6. Step 6: Final answer
    x = 136,153.89

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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.