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Finding the Fourth Proportional to 155,943.61, 215,201.54 and 84,323.61

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Solution

The fourth proportional to 155,943.61, 215,201.54 and 84,323.61 is: 116,366.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,943.61 : 215,201.54 = 84,323.61 : x
  2. Step 2: Convert to fraction form
    155,943.61/215,201.54 = 84,323.61/x
  3. Step 3: Cross multiply
    155,943.61x = 215,201.54 × 84,323.61
  4. Step 4: Simplify right side
    155,943.61x = 18,146,570,308.74
  5. Step 5: Solve for x
    x = 18,146,570,308.74/155,943.61
  6. Step 6: Final answer
    x = 116,366.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.