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Finding the Fourth Proportional to 100,902.51, 139,246.43 and 55,580.69

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Solution

The fourth proportional to 100,902.51, 139,246.43 and 55,580.69 is: 76,701.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,902.51 : 139,246.43 = 55,580.69 : x
  2. Step 2: Convert to fraction form
    100,902.51/139,246.43 = 55,580.69/x
  3. Step 3: Cross multiply
    100,902.51x = 139,246.43 × 55,580.69
  4. Step 4: Simplify right side
    100,902.51x = 7,739,412,659.44
  5. Step 5: Solve for x
    x = 7,739,412,659.44/100,902.51
  6. Step 6: Final answer
    x = 76,701.88

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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.