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Finding the Fourth Proportional to 71,308.36, 98,401.79 and 39,036.80

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Solution

The fourth proportional to 71,308.36, 98,401.79 and 39,036.80 is: 53,868.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,308.36 : 98,401.79 = 39,036.80 : x
  2. Step 2: Convert to fraction form
    71,308.36/98,401.79 = 39,036.80/x
  3. Step 3: Cross multiply
    71,308.36x = 98,401.79 × 39,036.80
  4. Step 4: Simplify right side
    71,308.36x = 3,841,290,785.96
  5. Step 5: Solve for x
    x = 3,841,290,785.96/71,308.36
  6. Step 6: Final answer
    x = 53,868.73

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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.