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Finding the Fourth Proportional to 64,584.80, 89,125.88 and 39,434.28

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Solution

The fourth proportional to 64,584.80, 89,125.88 and 39,434.28 is: 54,418.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,584.80 : 89,125.88 = 39,434.28 : x
  2. Step 2: Convert to fraction form
    64,584.80/89,125.88 = 39,434.28/x
  3. Step 3: Cross multiply
    64,584.80x = 89,125.88 × 39,434.28
  4. Step 4: Simplify right side
    64,584.80x = 3,514,614,907.17
  5. Step 5: Solve for x
    x = 3,514,614,907.17/64,584.80
  6. Step 6: Final answer
    x = 54,418.61

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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.