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Finding the Fourth Proportional to 64,940.54, 89,584.92 and 39,440.12

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Solution

The fourth proportional to 64,940.54, 89,584.92 and 39,440.12 is: 54,407.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,940.54 : 89,584.92 = 39,440.12 : x
  2. Step 2: Convert to fraction form
    64,940.54/89,584.92 = 39,440.12/x
  3. Step 3: Cross multiply
    64,940.54x = 89,584.92 × 39,440.12
  4. Step 4: Simplify right side
    64,940.54x = 3,533,239,547.07
  5. Step 5: Solve for x
    x = 3,533,239,547.07/64,940.54
  6. Step 6: Final answer
    x = 54,407.31

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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.