Home / 128,516.55-177,234.31-88,159.11

Finding the Fourth Proportional to 128,516.55, 177,234.31 and 88,159.11

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Solution

The fourth proportional to 128,516.55, 177,234.31 and 88,159.11 is: 121,578.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,516.55 : 177,234.31 = 88,159.11 : x
  2. Step 2: Convert to fraction form
    128,516.55/177,234.31 = 88,159.11/x
  3. Step 3: Cross multiply
    128,516.55x = 177,234.31 × 88,159.11
  4. Step 4: Simplify right side
    128,516.55x = 15,624,819,031.06
  5. Step 5: Solve for x
    x = 15,624,819,031.06/128,516.55
  6. Step 6: Final answer
    x = 121,578.26

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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.