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Finding the Fourth Proportional to 128,930.36, 193,390.68 and 35,433.68

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Solution

The fourth proportional to 128,930.36, 193,390.68 and 35,433.68 is: 53,149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,930.36 : 193,390.68 = 35,433.68 : x
  2. Step 2: Convert to fraction form
    128,930.36/193,390.68 = 35,433.68/x
  3. Step 3: Cross multiply
    128,930.36x = 193,390.68 × 35,433.68
  4. Step 4: Simplify right side
    128,930.36x = 6,852,543,470.10
  5. Step 5: Solve for x
    x = 6,852,543,470.10/128,930.36
  6. Step 6: Final answer
    x = 53,149.18

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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.