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Finding the Fourth Proportional to 71,388.50, 98,520.06 and 39,556.70

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Solution

The fourth proportional to 71,388.50, 98,520.06 and 39,556.70 is: 54,590.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,388.50 : 98,520.06 = 39,556.70 : x
  2. Step 2: Convert to fraction form
    71,388.50/98,520.06 = 39,556.70/x
  3. Step 3: Cross multiply
    71,388.50x = 98,520.06 × 39,556.70
  4. Step 4: Simplify right side
    71,388.50x = 3,897,128,457.40
  5. Step 5: Solve for x
    x = 3,897,128,457.40/71,388.50
  6. Step 6: Final answer
    x = 54,590.42

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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.