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Finding the Fourth Proportional to 128,513.40, 192,798.90 and 49,620.60

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Solution

The fourth proportional to 128,513.40, 192,798.90 and 49,620.60 is: 74,442.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,513.40 : 192,798.90 = 49,620.60 : x
  2. Step 2: Convert to fraction form
    128,513.40/192,798.90 = 49,620.60/x
  3. Step 3: Cross multiply
    128,513.40x = 192,798.90 × 49,620.60
  4. Step 4: Simplify right side
    128,513.40x = 9,566,797,097.34
  5. Step 5: Solve for x
    x = 9,566,797,097.34/128,513.40
  6. Step 6: Final answer
    x = 74,442.02

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1.5x scale

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.