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Finding the Fourth Proportional to 64,764.12, 89,379.04 and 36,085.64

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Solution

The fourth proportional to 64,764.12, 89,379.04 and 36,085.64 is: 49,800.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,764.12 : 89,379.04 = 36,085.64 : x
  2. Step 2: Convert to fraction form
    64,764.12/89,379.04 = 36,085.64/x
  3. Step 3: Cross multiply
    64,764.12x = 89,379.04 × 36,085.64
  4. Step 4: Simplify right side
    64,764.12x = 3,225,299,860.99
  5. Step 5: Solve for x
    x = 3,225,299,860.99/64,764.12
  6. Step 6: Final answer
    x = 49,800.72

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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.