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Finding the Fourth Proportional to 128,799.48, 177,754.86 and 75,101.88

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Solution

The fourth proportional to 128,799.48, 177,754.86 and 75,101.88 is: 103,647.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,799.48 : 177,754.86 = 75,101.88 : x
  2. Step 2: Convert to fraction form
    128,799.48/177,754.86 = 75,101.88/x
  3. Step 3: Cross multiply
    128,799.48x = 177,754.86 × 75,101.88
  4. Step 4: Simplify right side
    128,799.48x = 13,349,724,165.14
  5. Step 5: Solve for x
    x = 13,349,724,165.14/128,799.48
  6. Step 6: Final answer
    x = 103,647.35

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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.