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Finding the Fourth Proportional to 128,497.52, 192,804.60 and 76,009.52

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Solution

The fourth proportional to 128,497.52, 192,804.60 and 76,009.52 is: 114,048.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,497.52 : 192,804.60 = 76,009.52 : x
  2. Step 2: Convert to fraction form
    128,497.52/192,804.60 = 76,009.52/x
  3. Step 3: Cross multiply
    128,497.52x = 192,804.60 × 76,009.52
  4. Step 4: Simplify right side
    128,497.52x = 14,654,985,099.79
  5. Step 5: Solve for x
    x = 14,654,985,099.79/128,497.52
  6. Step 6: Final answer
    x = 114,048.78

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1.5x scale

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.