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Finding the Fourth Proportional to 92,453.94, 138,012.09 and 81,243.88

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Solution

The fourth proportional to 92,453.94, 138,012.09 and 81,243.88 is: 121,278.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,453.94 : 138,012.09 = 81,243.88 : x
  2. Step 2: Convert to fraction form
    92,453.94/138,012.09 = 81,243.88/x
  3. Step 3: Cross multiply
    92,453.94x = 138,012.09 × 81,243.88
  4. Step 4: Simplify right side
    92,453.94x = 11,212,637,028.81
  5. Step 5: Solve for x
    x = 11,212,637,028.81/92,453.94
  6. Step 6: Final answer
    x = 121,278.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.