Home / 268,117.29-402,183.23-81,128.79

Finding the Fourth Proportional to 268,117.29, 402,183.23 and 81,128.79

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Solution

The fourth proportional to 268,117.29, 402,183.23 and 81,128.79 is: 121,695.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,117.29 : 402,183.23 = 81,128.79 : x
  2. Step 2: Convert to fraction form
    268,117.29/402,183.23 = 81,128.79/x
  3. Step 3: Cross multiply
    268,117.29x = 402,183.23 × 81,128.79
  4. Step 4: Simplify right side
    268,117.29x = 32,628,638,402.55
  5. Step 5: Solve for x
    x = 32,628,638,402.55/268,117.29
  6. Step 6: Final answer
    x = 121,695.39

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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.