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Finding the Fourth Proportional to 64,990.69, 89,685.84 and 36,695.77

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Solution

The fourth proportional to 64,990.69, 89,685.84 and 36,695.77 is: 50,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,990.69 : 89,685.84 = 36,695.77 : x
  2. Step 2: Convert to fraction form
    64,990.69/89,685.84 = 36,695.77/x
  3. Step 3: Cross multiply
    64,990.69x = 89,685.84 × 36,695.77
  4. Step 4: Simplify right side
    64,990.69x = 3,291,090,956.90
  5. Step 5: Solve for x
    x = 3,291,090,956.90/64,990.69
  6. Step 6: Final answer
    x = 50,639.42

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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.