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Finding the Fourth Proportional to 128,922.62, 193,441.94 and 69,688.94

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Solution

The fourth proportional to 128,922.62, 193,441.94 and 69,688.94 is: 104,564.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.62 : 193,441.94 = 69,688.94 : x
  2. Step 2: Convert to fraction form
    128,922.62/193,441.94 = 69,688.94/x
  3. Step 3: Cross multiply
    128,922.62x = 193,441.94 × 69,688.94
  4. Step 4: Simplify right side
    128,922.62x = 13,480,763,750.14
  5. Step 5: Solve for x
    x = 13,480,763,750.14/128,922.62
  6. Step 6: Final answer
    x = 104,564.77

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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.