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Finding the Fourth Proportional to 43,418.86, 64,738.11 and 39,711.84

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Solution

The fourth proportional to 43,418.86, 64,738.11 and 39,711.84 is: 59,210.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,418.86 : 64,738.11 = 39,711.84 : x
  2. Step 2: Convert to fraction form
    43,418.86/64,738.11 = 39,711.84/x
  3. Step 3: Cross multiply
    43,418.86x = 64,738.11 × 39,711.84
  4. Step 4: Simplify right side
    43,418.86x = 2,570,869,466.22
  5. Step 5: Solve for x
    x = 2,570,869,466.22/43,418.86
  6. Step 6: Final answer
    x = 59,210.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.