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Finding the Fourth Proportional to 128,951,808.80, 193,427,713.20 and 113,835,264.80

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Solution

The fourth proportional to 128,951,808.80, 193,427,713.20 and 113,835,264.80 is: 170,752,897.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,951,808.80 : 193,427,713.20 = 113,835,264.80 : x
  2. Step 2: Convert to fraction form
    128,951,808.80/193,427,713.20 = 113,835,264.80/x
  3. Step 3: Cross multiply
    128,951,808.80x = 193,427,713.20 × 113,835,264.80
  4. Step 4: Simplify right side
    128,951,808.80x = 22,018,894,951,780,452
  5. Step 5: Solve for x
    x = 22,018,894,951,780,452/128,951,808.80
  6. Step 6: Final answer
    x = 170,752,897.20

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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.