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Finding the Fourth Proportional to 79,883.90, 110,705.80 and 78,756.38

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Solution

The fourth proportional to 79,883.90, 110,705.80 and 78,756.38 is: 109,143.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,883.90 : 110,705.80 = 78,756.38 : x
  2. Step 2: Convert to fraction form
    79,883.90/110,705.80 = 78,756.38/x
  3. Step 3: Cross multiply
    79,883.90x = 110,705.80 × 78,756.38
  4. Step 4: Simplify right side
    79,883.90x = 8,718,787,302.58
  5. Step 5: Solve for x
    x = 8,718,787,302.58/79,883.90
  6. Step 6: Final answer
    x = 109,143.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.