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Finding the Fourth Proportional to 78,649.62, 108,556.08 and 48,460.80

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Solution

The fourth proportional to 78,649.62, 108,556.08 and 48,460.80 is: 66,887.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,649.62 : 108,556.08 = 48,460.80 : x
  2. Step 2: Convert to fraction form
    78,649.62/108,556.08 = 48,460.80/x
  3. Step 3: Cross multiply
    78,649.62x = 108,556.08 × 48,460.80
  4. Step 4: Simplify right side
    78,649.62x = 5,260,714,481.66
  5. Step 5: Solve for x
    x = 5,260,714,481.66/78,649.62
  6. Step 6: Final answer
    x = 66,887.98

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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.