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Finding the Fourth Proportional to 64,461.78, 89,048.61 and 61,351.38

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Solution

The fourth proportional to 64,461.78, 89,048.61 and 61,351.38 is: 84,751.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,461.78 : 89,048.61 = 61,351.38 : x
  2. Step 2: Convert to fraction form
    64,461.78/89,048.61 = 61,351.38/x
  3. Step 3: Cross multiply
    64,461.78x = 89,048.61 × 61,351.38
  4. Step 4: Simplify right side
    64,461.78x = 5,463,255,110.58
  5. Step 5: Solve for x
    x = 5,463,255,110.58/64,461.78
  6. Step 6: Final answer
    x = 84,751.85

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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.