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Finding the Fourth Proportional to 169,210.08, 253,815.12 and 80,415.15

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Solution

The fourth proportional to 169,210.08, 253,815.12 and 80,415.15 is: 120,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,210.08 : 253,815.12 = 80,415.15 : x
  2. Step 2: Convert to fraction form
    169,210.08/253,815.12 = 80,415.15/x
  3. Step 3: Cross multiply
    169,210.08x = 253,815.12 × 80,415.15
  4. Step 4: Simplify right side
    169,210.08x = 20,410,579,995.26
  5. Step 5: Solve for x
    x = 20,410,579,995.26/169,210.08
  6. Step 6: Final answer
    x = 120,622.72

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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.