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Finding the Fourth Proportional to 159,920.66, 220,688.97 and 88,299.16

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Solution

The fourth proportional to 159,920.66, 220,688.97 and 88,299.16 is: 121,851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,920.66 : 220,688.97 = 88,299.16 : x
  2. Step 2: Convert to fraction form
    159,920.66/220,688.97 = 88,299.16/x
  3. Step 3: Cross multiply
    159,920.66x = 220,688.97 × 88,299.16
  4. Step 4: Simplify right side
    159,920.66x = 19,486,649,568.82
  5. Step 5: Solve for x
    x = 19,486,649,568.82/159,920.66
  6. Step 6: Final answer
    x = 121,851.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.