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Finding the Fourth Proportional to 64,802.87, 89,424.20 and 36,121.58

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Solution

The fourth proportional to 64,802.87, 89,424.20 and 36,121.58 is: 49,845.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,802.87 : 89,424.20 = 36,121.58 : x
  2. Step 2: Convert to fraction form
    64,802.87/89,424.20 = 36,121.58/x
  3. Step 3: Cross multiply
    64,802.87x = 89,424.20 × 36,121.58
  4. Step 4: Simplify right side
    64,802.87x = 3,230,142,766.51
  5. Step 5: Solve for x
    x = 3,230,142,766.51/64,802.87
  6. Step 6: Final answer
    x = 49,845.68

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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.