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Finding the Fourth Proportional to 64,914.66, 89,520.12 and 39,425.18

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Solution

The fourth proportional to 64,914.66, 89,520.12 and 39,425.18 is: 54,369.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,914.66 : 89,520.12 = 39,425.18 : x
  2. Step 2: Convert to fraction form
    64,914.66/89,520.12 = 39,425.18/x
  3. Step 3: Cross multiply
    64,914.66x = 89,520.12 × 39,425.18
  4. Step 4: Simplify right side
    64,914.66x = 3,529,346,397.02
  5. Step 5: Solve for x
    x = 3,529,346,397.02/64,914.66
  6. Step 6: Final answer
    x = 54,369.02

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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.