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Finding the Fourth Proportional to 66,218.31, 91,378.98 and 37,918.53

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Solution

The fourth proportional to 66,218.31, 91,378.98 and 37,918.53 is: 52,326.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,218.31 : 91,378.98 = 37,918.53 : x
  2. Step 2: Convert to fraction form
    66,218.31/91,378.98 = 37,918.53/x
  3. Step 3: Cross multiply
    66,218.31x = 91,378.98 × 37,918.53
  4. Step 4: Simplify right side
    66,218.31x = 3,464,956,594.50
  5. Step 5: Solve for x
    x = 3,464,956,594.50/66,218.31
  6. Step 6: Final answer
    x = 52,326.26

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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.