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Finding the Fourth Proportional to 99,911,686.80, 149,654,953.80 and 82,905,574.80

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Solution

The fourth proportional to 99,911,686.80, 149,654,953.80 and 82,905,574.80 is: 124,181,968.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,911,686.80 : 149,654,953.80 = 82,905,574.80 : x
  2. Step 2: Convert to fraction form
    99,911,686.80/149,654,953.80 = 82,905,574.80/x
  3. Step 3: Cross multiply
    99,911,686.80x = 149,654,953.80 × 82,905,574.80
  4. Step 4: Simplify right side
    99,911,686.80x = 12,407,229,966,456,444
  5. Step 5: Solve for x
    x = 12,407,229,966,456,444/99,911,686.80
  6. Step 6: Final answer
    x = 124,181,968.73

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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.