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Finding the Fourth Proportional to 78,994.44, 109,024.20 and 48,385.80

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Solution

The fourth proportional to 78,994.44, 109,024.20 and 48,385.80 is: 66,779.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,994.44 : 109,024.20 = 48,385.80 : x
  2. Step 2: Convert to fraction form
    78,994.44/109,024.20 = 48,385.80/x
  3. Step 3: Cross multiply
    78,994.44x = 109,024.20 × 48,385.80
  4. Step 4: Simplify right side
    78,994.44x = 5,275,223,136.36
  5. Step 5: Solve for x
    x = 5,275,223,136.36/78,994.44
  6. Step 6: Final answer
    x = 66,779.68

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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.