Home / 66,531.84-91,811.64-39,660.50

Finding the Fourth Proportional to 66,531.84, 91,811.64 and 39,660.50

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Solution

The fourth proportional to 66,531.84, 91,811.64 and 39,660.50 is: 54,730.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531.84 : 91,811.64 = 39,660.50 : x
  2. Step 2: Convert to fraction form
    66,531.84/91,811.64 = 39,660.50/x
  3. Step 3: Cross multiply
    66,531.84x = 91,811.64 × 39,660.50
  4. Step 4: Simplify right side
    66,531.84x = 3,641,295,548.22
  5. Step 5: Solve for x
    x = 3,641,295,548.22/66,531.84
  6. Step 6: Final answer
    x = 54,730.12

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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.