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Finding the Fourth Proportional to 80,003.80, 120,005.70 and 61,341.40

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Solution

The fourth proportional to 80,003.80, 120,005.70 and 61,341.40 is: 92,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,003.80 : 120,005.70 = 61,341.40 : x
  2. Step 2: Convert to fraction form
    80,003.80/120,005.70 = 61,341.40/x
  3. Step 3: Cross multiply
    80,003.80x = 120,005.70 × 61,341.40
  4. Step 4: Simplify right side
    80,003.80x = 7,361,317,645.98
  5. Step 5: Solve for x
    x = 7,361,317,645.98/80,003.80
  6. Step 6: Final answer
    x = 92,012.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.