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Finding the Fourth Proportional to 135,805.51, 187,407.81 and 74,551.69

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Solution

The fourth proportional to 135,805.51, 187,407.81 and 74,551.69 is: 102,879.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,805.51 : 187,407.81 = 74,551.69 : x
  2. Step 2: Convert to fraction form
    135,805.51/187,407.81 = 74,551.69/x
  3. Step 3: Cross multiply
    135,805.51x = 187,407.81 × 74,551.69
  4. Step 4: Simplify right side
    135,805.51x = 13,971,569,188.96
  5. Step 5: Solve for x
    x = 13,971,569,188.96/135,805.51
  6. Step 6: Final answer
    x = 102,879.25

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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.