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Finding the Fourth Proportional to 128,928.36, 193,387.68 and 35,431.68

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Solution

The fourth proportional to 128,928.36, 193,387.68 and 35,431.68 is: 53,146.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928.36 : 193,387.68 = 35,431.68 : x
  2. Step 2: Convert to fraction form
    128,928.36/193,387.68 = 35,431.68/x
  3. Step 3: Cross multiply
    128,928.36x = 193,387.68 × 35,431.68
  4. Step 4: Simplify right side
    128,928.36x = 6,852,050,393.70
  5. Step 5: Solve for x
    x = 6,852,050,393.70/128,928.36
  6. Step 6: Final answer
    x = 53,146.18

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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.