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Finding the Fourth Proportional to 128,512.90, 192,798.15 and 49,620.10

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Solution

The fourth proportional to 128,512.90, 192,798.15 and 49,620.10 is: 74,441.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,512.90 : 192,798.15 = 49,620.10 : x
  2. Step 2: Convert to fraction form
    128,512.90/192,798.15 = 49,620.10/x
  3. Step 3: Cross multiply
    128,512.90x = 192,798.15 × 49,620.10
  4. Step 4: Simplify right side
    128,512.90x = 9,566,663,482.82
  5. Step 5: Solve for x
    x = 9,566,663,482.82/128,512.90
  6. Step 6: Final answer
    x = 74,441.27

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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.