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Finding the Fourth Proportional to 128,903.52, 193,347.48 and 76,645.56

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Solution

The fourth proportional to 128,903.52, 193,347.48 and 76,645.56 is: 114,963.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,903.52 : 193,347.48 = 76,645.56 : x
  2. Step 2: Convert to fraction form
    128,903.52/193,347.48 = 76,645.56/x
  3. Step 3: Cross multiply
    128,903.52x = 193,347.48 × 76,645.56
  4. Step 4: Simplify right side
    128,903.52x = 14,819,225,879.19
  5. Step 5: Solve for x
    x = 14,819,225,879.19/128,903.52
  6. Step 6: Final answer
    x = 114,963.70

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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.