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Finding the Fourth Proportional to 66,244.88, 91,412.40 and 39,016.64

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Solution

The fourth proportional to 66,244.88, 91,412.40 and 39,016.64 is: 53,839.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,244.88 : 91,412.40 = 39,016.64 : x
  2. Step 2: Convert to fraction form
    66,244.88/91,412.40 = 39,016.64/x
  3. Step 3: Cross multiply
    66,244.88x = 91,412.40 × 39,016.64
  4. Step 4: Simplify right side
    66,244.88x = 3,566,604,702.34
  5. Step 5: Solve for x
    x = 3,566,604,702.34/66,244.88
  6. Step 6: Final answer
    x = 53,839.70

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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.