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Finding the Fourth Proportional to 100,502.01, 138,687.53 and 68,678.73

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Solution

The fourth proportional to 100,502.01, 138,687.53 and 68,678.73 is: 94,773.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,502.01 : 138,687.53 = 68,678.73 : x
  2. Step 2: Convert to fraction form
    100,502.01/138,687.53 = 68,678.73/x
  3. Step 3: Cross multiply
    100,502.01x = 138,687.53 × 68,678.73
  4. Step 4: Simplify right side
    100,502.01x = 9,524,883,083.84
  5. Step 5: Solve for x
    x = 9,524,883,083.84/100,502.01
  6. Step 6: Final answer
    x = 94,773.06

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1.5x scale

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.