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Finding the Fourth Proportional to 112,451, 155,167.37 and 72,219.21

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Solution

The fourth proportional to 112,451, 155,167.37 and 72,219.21 is: 99,652.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,451 : 155,167.37 = 72,219.21 : x
  2. Step 2: Convert to fraction form
    112,451/155,167.37 = 72,219.21/x
  3. Step 3: Cross multiply
    112,451x = 155,167.37 × 72,219.21
  4. Step 4: Simplify right side
    112,451x = 11,206,064,879.18
  5. Step 5: Solve for x
    x = 11,206,064,879.18/112,451
  6. Step 6: Final answer
    x = 99,652.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.