Home / 71,139.42-98,169.26-39,307.64

Finding the Fourth Proportional to 71,139.42, 98,169.26 and 39,307.64

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Solution

The fourth proportional to 71,139.42, 98,169.26 and 39,307.64 is: 54,242.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,139.42 : 98,169.26 = 39,307.64 : x
  2. Step 2: Convert to fraction form
    71,139.42/98,169.26 = 39,307.64/x
  3. Step 3: Cross multiply
    71,139.42x = 98,169.26 × 39,307.64
  4. Step 4: Simplify right side
    71,139.42x = 3,858,801,243.76
  5. Step 5: Solve for x
    x = 3,858,801,243.76/71,139.42
  6. Step 6: Final answer
    x = 54,242.80

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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.