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Finding the Fourth Proportional to 155,321.62, 232,640.94 and 128,362.06

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Solution

The fourth proportional to 155,321.62, 232,640.94 and 128,362.06 is: 192,260.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,321.62 : 232,640.94 = 128,362.06 : x
  2. Step 2: Convert to fraction form
    155,321.62/232,640.94 = 128,362.06/x
  3. Step 3: Cross multiply
    155,321.62x = 232,640.94 × 128,362.06
  4. Step 4: Simplify right side
    155,321.62x = 29,862,270,298.74
  5. Step 5: Solve for x
    x = 29,862,270,298.74/155,321.62
  6. Step 6: Final answer
    x = 192,260.87

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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.