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Finding the Fourth Proportional to 128,927.62, 193,449.44 and 69,693.94

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Solution

The fourth proportional to 128,927.62, 193,449.44 and 69,693.94 is: 104,572.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.62 : 193,449.44 = 69,693.94 : x
  2. Step 2: Convert to fraction form
    128,927.62/193,449.44 = 69,693.94/x
  3. Step 3: Cross multiply
    128,927.62x = 193,449.44 × 69,693.94
  4. Step 4: Simplify right side
    128,927.62x = 13,482,253,664.39
  5. Step 5: Solve for x
    x = 13,482,253,664.39/128,927.62
  6. Step 6: Final answer
    x = 104,572.27

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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.