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Finding the Fourth Proportional to 76,850.40, 106,051.44 and 42,859.92

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Solution

The fourth proportional to 76,850.40, 106,051.44 and 42,859.92 is: 59,145.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,850.40 : 106,051.44 = 42,859.92 : x
  2. Step 2: Convert to fraction form
    76,850.40/106,051.44 = 42,859.92/x
  3. Step 3: Cross multiply
    76,850.40x = 106,051.44 × 42,859.92
  4. Step 4: Simplify right side
    76,850.40x = 4,545,356,234.28
  5. Step 5: Solve for x
    x = 4,545,356,234.28/76,850.40
  6. Step 6: Final answer
    x = 59,145.51

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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.