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Finding the Fourth Proportional to 352,419.76, 528,629.64 and 86,177.12

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Solution

The fourth proportional to 352,419.76, 528,629.64 and 86,177.12 is: 129,265.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,419.76 : 528,629.64 = 86,177.12 : x
  2. Step 2: Convert to fraction form
    352,419.76/528,629.64 = 86,177.12/x
  3. Step 3: Cross multiply
    352,419.76x = 528,629.64 × 86,177.12
  4. Step 4: Simplify right side
    352,419.76x = 45,555,777,440.27
  5. Step 5: Solve for x
    x = 45,555,777,440.27/352,419.76
  6. Step 6: Final answer
    x = 129,265.67

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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.