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Finding the Fourth Proportional to 66,257.04, 91,404 and 39,384.48

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Solution

The fourth proportional to 66,257.04, 91,404 and 39,384.48 is: 54,332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,257.04 : 91,404 = 39,384.48 : x
  2. Step 2: Convert to fraction form
    66,257.04/91,404 = 39,384.48/x
  3. Step 3: Cross multiply
    66,257.04x = 91,404 × 39,384.48
  4. Step 4: Simplify right side
    66,257.04x = 3,599,899,009.92
  5. Step 5: Solve for x
    x = 3,599,899,009.92/66,257.04
  6. Step 6: Final answer
    x = 54,332.32

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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.