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Finding the Fourth Proportional to 64,971.78, 89,636.36 and 40,762.49

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Solution

The fourth proportional to 64,971.78, 89,636.36 and 40,762.49 is: 56,236.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,971.78 : 89,636.36 = 40,762.49 : x
  2. Step 2: Convert to fraction form
    64,971.78/89,636.36 = 40,762.49/x
  3. Step 3: Cross multiply
    64,971.78x = 89,636.36 × 40,762.49
  4. Step 4: Simplify right side
    64,971.78x = 3,653,801,252.31
  5. Step 5: Solve for x
    x = 3,653,801,252.31/64,971.78
  6. Step 6: Final answer
    x = 56,236.74

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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.