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Finding the Fourth Proportional to 64,143.90, 88,396.11 and 55,745.82

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Solution

The fourth proportional to 64,143.90, 88,396.11 and 55,745.82 is: 76,822.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,143.90 : 88,396.11 = 55,745.82 : x
  2. Step 2: Convert to fraction form
    64,143.90/88,396.11 = 55,745.82/x
  3. Step 3: Cross multiply
    64,143.90x = 88,396.11 × 55,745.82
  4. Step 4: Simplify right side
    64,143.90x = 4,927,713,636.76
  5. Step 5: Solve for x
    x = 4,927,713,636.76/64,143.90
  6. Step 6: Final answer
    x = 76,822.79

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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.