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Finding the Fourth Proportional to 128,552.10, 192,500.10 and 102,308.10

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Solution

The fourth proportional to 128,552.10, 192,500.10 and 102,308.10 is: 153,201.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,552.10 : 192,500.10 = 102,308.10 : x
  2. Step 2: Convert to fraction form
    128,552.10/192,500.10 = 102,308.10/x
  3. Step 3: Cross multiply
    128,552.10x = 192,500.10 × 102,308.10
  4. Step 4: Simplify right side
    128,552.10x = 19,694,319,480.81
  5. Step 5: Solve for x
    x = 19,694,319,480.81/128,552.10
  6. Step 6: Final answer
    x = 153,201.07

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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.