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Finding the Fourth Proportional to 135,078.69, 186,407.76 and 74,652.83

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Solution

The fourth proportional to 135,078.69, 186,407.76 and 74,652.83 is: 103,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,078.69 : 186,407.76 = 74,652.83 : x
  2. Step 2: Convert to fraction form
    135,078.69/186,407.76 = 74,652.83/x
  3. Step 3: Cross multiply
    135,078.69x = 186,407.76 × 74,652.83
  4. Step 4: Simplify right side
    135,078.69x = 13,915,866,817.96
  5. Step 5: Solve for x
    x = 13,915,866,817.96/135,078.69
  6. Step 6: Final answer
    x = 103,020.45

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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.