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Finding the Fourth Proportional to 71,509.74, 98,679.97 and 39,243.59

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Solution

The fourth proportional to 71,509.74, 98,679.97 and 39,243.59 is: 54,154.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,509.74 : 98,679.97 = 39,243.59 : x
  2. Step 2: Convert to fraction form
    71,509.74/98,679.97 = 39,243.59/x
  3. Step 3: Cross multiply
    71,509.74x = 98,679.97 × 39,243.59
  4. Step 4: Simplify right side
    71,509.74x = 3,872,556,209.60
  5. Step 5: Solve for x
    x = 3,872,556,209.60/71,509.74
  6. Step 6: Final answer
    x = 54,154.25

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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.