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Finding the Fourth Proportional to 81,406.10, 122,109.15 and 60,410.90

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Solution

The fourth proportional to 81,406.10, 122,109.15 and 60,410.90 is: 90,616.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,406.10 : 122,109.15 = 60,410.90 : x
  2. Step 2: Convert to fraction form
    81,406.10/122,109.15 = 60,410.90/x
  3. Step 3: Cross multiply
    81,406.10x = 122,109.15 × 60,410.90
  4. Step 4: Simplify right side
    81,406.10x = 7,376,723,649.74
  5. Step 5: Solve for x
    x = 7,376,723,649.74/81,406.10
  6. Step 6: Final answer
    x = 90,616.35

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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.