Home / 71,679.47-98,915.09-39,847.68

Finding the Fourth Proportional to 71,679.47, 98,915.09 and 39,847.68

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Solution

The fourth proportional to 71,679.47, 98,915.09 and 39,847.68 is: 54,988.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,679.47 : 98,915.09 = 39,847.68 : x
  2. Step 2: Convert to fraction form
    71,679.47/98,915.09 = 39,847.68/x
  3. Step 3: Cross multiply
    71,679.47x = 98,915.09 × 39,847.68
  4. Step 4: Simplify right side
    71,679.47x = 3,941,536,654.25
  5. Step 5: Solve for x
    x = 3,941,536,654.25/71,679.47
  6. Step 6: Final answer
    x = 54,988.37

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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.