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Finding the Fourth Proportional to 128,797.76, 193,197.36 and 58,628

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Solution

The fourth proportional to 128,797.76, 193,197.36 and 58,628 is: 87,942.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,797.76 : 193,197.36 = 58,628 : x
  2. Step 2: Convert to fraction form
    128,797.76/193,197.36 = 58,628/x
  3. Step 3: Cross multiply
    128,797.76x = 193,197.36 × 58,628
  4. Step 4: Simplify right side
    128,797.76x = 11,326,774,822.08
  5. Step 5: Solve for x
    x = 11,326,774,822.08/128,797.76
  6. Step 6: Final answer
    x = 87,942.33

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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.