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Finding the Fourth Proportional to 128,873,108.80, 193,415,416.80 and 127,865,339.20

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Solution

The fourth proportional to 128,873,108.80, 193,415,416.80 and 127,865,339.20 is: 191,902,935.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,873,108.80 : 193,415,416.80 = 127,865,339.20 : x
  2. Step 2: Convert to fraction form
    128,873,108.80/193,415,416.80 = 127,865,339.20/x
  3. Step 3: Cross multiply
    128,873,108.80x = 193,415,416.80 × 127,865,339.20
  4. Step 4: Simplify right side
    128,873,108.80x = 24,731,127,875,641,380
  5. Step 5: Solve for x
    x = 24,731,127,875,641,380/128,873,108.80
  6. Step 6: Final answer
    x = 191,902,935.42

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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.