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Finding the Fourth Proportional to 71,642.98, 98,869.71 and 39,813.22

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Solution

The fourth proportional to 71,642.98, 98,869.71 and 39,813.22 is: 54,943.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,642.98 : 98,869.71 = 39,813.22 : x
  2. Step 2: Convert to fraction form
    71,642.98/98,869.71 = 39,813.22/x
  3. Step 3: Cross multiply
    71,642.98x = 98,869.71 × 39,813.22
  4. Step 4: Simplify right side
    71,642.98x = 3,936,321,515.57
  5. Step 5: Solve for x
    x = 3,936,321,515.57/71,642.98
  6. Step 6: Final answer
    x = 54,943.58

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1.5x scale

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.