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Finding the Fourth Proportional to 352,745.55, 528,965.24 and 128,031.30

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Solution

The fourth proportional to 352,745.55, 528,965.24 and 128,031.30 is: 191,991.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,745.55 : 528,965.24 = 128,031.30 : x
  2. Step 2: Convert to fraction form
    352,745.55/528,965.24 = 128,031.30/x
  3. Step 3: Cross multiply
    352,745.55x = 528,965.24 × 128,031.30
  4. Step 4: Simplify right side
    352,745.55x = 67,724,106,691.86
  5. Step 5: Solve for x
    x = 67,724,106,691.86/352,745.55
  6. Step 6: Final answer
    x = 191,991.38

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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.