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Finding the Fourth Proportional to 128,708.53, 193,060 and 35,214.28

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Solution

The fourth proportional to 128,708.53, 193,060 and 35,214.28 is: 52,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,708.53 : 193,060 = 35,214.28 : x
  2. Step 2: Convert to fraction form
    128,708.53/193,060 = 35,214.28/x
  3. Step 3: Cross multiply
    128,708.53x = 193,060 × 35,214.28
  4. Step 4: Simplify right side
    128,708.53x = 6,798,468,896.80
  5. Step 5: Solve for x
    x = 6,798,468,896.80/128,708.53
  6. Step 6: Final answer
    x = 52,820.66

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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.