Home / 99,983.16-137,963.39-64,221.66

Finding the Fourth Proportional to 99,983.16, 137,963.39 and 64,221.66

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Solution

The fourth proportional to 99,983.16, 137,963.39 and 64,221.66 is: 88,617.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,983.16 : 137,963.39 = 64,221.66 : x
  2. Step 2: Convert to fraction form
    99,983.16/137,963.39 = 64,221.66/x
  3. Step 3: Cross multiply
    99,983.16x = 137,963.39 × 64,221.66
  4. Step 4: Simplify right side
    99,983.16x = 8,860,237,603.92
  5. Step 5: Solve for x
    x = 8,860,237,603.92/99,983.16
  6. Step 6: Final answer
    x = 88,617.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.