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Finding the Fourth Proportional to 128,498.52, 192,806.10 and 76,010.52

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Solution

The fourth proportional to 128,498.52, 192,806.10 and 76,010.52 is: 114,050.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,498.52 : 192,806.10 = 76,010.52 : x
  2. Step 2: Convert to fraction form
    128,498.52/192,806.10 = 76,010.52/x
  3. Step 3: Cross multiply
    128,498.52x = 192,806.10 × 76,010.52
  4. Step 4: Simplify right side
    128,498.52x = 14,655,291,920.17
  5. Step 5: Solve for x
    x = 14,655,291,920.17/128,498.52
  6. Step 6: Final answer
    x = 114,050.28

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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.