Home / 81,136.43-121,718.48-36,174.10

Finding the Fourth Proportional to 81,136.43, 121,718.48 and 36,174.10

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Solution

The fourth proportional to 81,136.43, 121,718.48 and 36,174.10 is: 54,267.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,136.43 : 121,718.48 = 36,174.10 : x
  2. Step 2: Convert to fraction form
    81,136.43/121,718.48 = 36,174.10/x
  3. Step 3: Cross multiply
    81,136.43x = 121,718.48 × 36,174.10
  4. Step 4: Simplify right side
    81,136.43x = 4,403,056,253.51
  5. Step 5: Solve for x
    x = 4,403,056,253.51/81,136.43
  6. Step 6: Final answer
    x = 54,267.32

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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.