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Finding the Fourth Proportional to 64,975.46, 89,673.92 and 39,485.99

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Solution

The fourth proportional to 64,975.46, 89,673.92 and 39,485.99 is: 54,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,975.46 : 89,673.92 = 39,485.99 : x
  2. Step 2: Convert to fraction form
    64,975.46/89,673.92 = 39,485.99/x
  3. Step 3: Cross multiply
    64,975.46x = 89,673.92 × 39,485.99
  4. Step 4: Simplify right side
    64,975.46x = 3,540,863,508.38
  5. Step 5: Solve for x
    x = 3,540,863,508.38/64,975.46
  6. Step 6: Final answer
    x = 54,495.40

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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.