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Finding the Fourth Proportional to 64,644.76, 89,235.18 and 40,766.68

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Solution

The fourth proportional to 64,644.76, 89,235.18 and 40,766.68 is: 56,274.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,644.76 : 89,235.18 = 40,766.68 : x
  2. Step 2: Convert to fraction form
    64,644.76/89,235.18 = 40,766.68/x
  3. Step 3: Cross multiply
    64,644.76x = 89,235.18 × 40,766.68
  4. Step 4: Simplify right side
    64,644.76x = 3,637,822,027.80
  5. Step 5: Solve for x
    x = 3,637,822,027.80/64,644.76
  6. Step 6: Final answer
    x = 56,274.04

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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.