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Finding the Fourth Proportional to 80,245.18, 120,368.37 and 21,080.74

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Solution

The fourth proportional to 80,245.18, 120,368.37 and 21,080.74 is: 31,621.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,245.18 : 120,368.37 = 21,080.74 : x
  2. Step 2: Convert to fraction form
    80,245.18/120,368.37 = 21,080.74/x
  3. Step 3: Cross multiply
    80,245.18x = 120,368.37 × 21,080.74
  4. Step 4: Simplify right side
    80,245.18x = 2,537,454,312.19
  5. Step 5: Solve for x
    x = 2,537,454,312.19/80,245.18
  6. Step 6: Final answer
    x = 31,621.27

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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.