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Finding the Fourth Proportional to 71,422.76, 98,556.45 and 39,590.98

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Solution

The fourth proportional to 71,422.76, 98,556.45 and 39,590.98 is: 54,631.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,422.76 : 98,556.45 = 39,590.98 : x
  2. Step 2: Convert to fraction form
    71,422.76/98,556.45 = 39,590.98/x
  3. Step 3: Cross multiply
    71,422.76x = 98,556.45 × 39,590.98
  4. Step 4: Simplify right side
    71,422.76x = 3,901,946,045.96
  5. Step 5: Solve for x
    x = 3,901,946,045.96/71,422.76
  6. Step 6: Final answer
    x = 54,631.69

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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.