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Finding the Fourth Proportional to 109,478.78, 151,080.63 and 59,177.78

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Solution

The fourth proportional to 109,478.78, 151,080.63 and 59,177.78 is: 81,665.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,478.78 : 151,080.63 = 59,177.78 : x
  2. Step 2: Convert to fraction form
    109,478.78/151,080.63 = 59,177.78/x
  3. Step 3: Cross multiply
    109,478.78x = 151,080.63 × 59,177.78
  4. Step 4: Simplify right side
    109,478.78x = 8,940,615,529.00
  5. Step 5: Solve for x
    x = 8,940,615,529.00/109,478.78
  6. Step 6: Final answer
    x = 81,665.29

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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.