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Finding the Fourth Proportional to 128,976.48, 193,459.68 and 35,479.68

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Solution

The fourth proportional to 128,976.48, 193,459.68 and 35,479.68 is: 53,218.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,976.48 : 193,459.68 = 35,479.68 : x
  2. Step 2: Convert to fraction form
    128,976.48/193,459.68 = 35,479.68/x
  3. Step 3: Cross multiply
    128,976.48x = 193,459.68 × 35,479.68
  4. Step 4: Simplify right side
    128,976.48x = 6,863,887,539.30
  5. Step 5: Solve for x
    x = 6,863,887,539.30/128,976.48
  6. Step 6: Final answer
    x = 53,218.13

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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.