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Finding the Fourth Proportional to 100,741.73, 138,998.43 and 64,888.59

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Solution

The fourth proportional to 100,741.73, 138,998.43 and 64,888.59 is: 89,530.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,741.73 : 138,998.43 = 64,888.59 : x
  2. Step 2: Convert to fraction form
    100,741.73/138,998.43 = 64,888.59/x
  3. Step 3: Cross multiply
    100,741.73x = 138,998.43 × 64,888.59
  4. Step 4: Simplify right side
    100,741.73x = 9,019,412,656.16
  5. Step 5: Solve for x
    x = 9,019,412,656.16/100,741.73
  6. Step 6: Final answer
    x = 89,530.06

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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.