Home / 128,876.91-193,456.79-102,393.13

Finding the Fourth Proportional to 128,876.91, 193,456.79 and 102,393.13

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Solution

The fourth proportional to 128,876.91, 193,456.79 and 102,393.13 is: 153,702.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,876.91 : 193,456.79 = 102,393.13 : x
  2. Step 2: Convert to fraction form
    128,876.91/193,456.79 = 102,393.13/x
  3. Step 3: Cross multiply
    128,876.91x = 193,456.79 × 102,393.13
  4. Step 4: Simplify right side
    128,876.91x = 19,808,645,998.95
  5. Step 5: Solve for x
    x = 19,808,645,998.95/128,876.91
  6. Step 6: Final answer
    x = 153,702.06

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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.