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Finding the Fourth Proportional to 100,507.00, 138,701.59 and 55,189.63

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Solution

The fourth proportional to 100,507.00, 138,701.59 and 55,189.63 is: 76,162.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,507.00 : 138,701.59 = 55,189.63 : x
  2. Step 2: Convert to fraction form
    100,507.00/138,701.59 = 55,189.63/x
  3. Step 3: Cross multiply
    100,507.00x = 138,701.59 × 55,189.63
  4. Step 4: Simplify right side
    100,507.00x = 7,654,889,233.04
  5. Step 5: Solve for x
    x = 7,654,889,233.04/100,507.00
  6. Step 6: Final answer
    x = 76,162.75

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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.