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Finding the Fourth Proportional to 135,612.61, 187,149.81 and 75,188.87

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Solution

The fourth proportional to 135,612.61, 187,149.81 and 75,188.87 is: 103,763.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,612.61 : 187,149.81 = 75,188.87 : x
  2. Step 2: Convert to fraction form
    135,612.61/187,149.81 = 75,188.87/x
  3. Step 3: Cross multiply
    135,612.61x = 187,149.81 × 75,188.87
  4. Step 4: Simplify right side
    135,612.61x = 14,071,582,734.61
  5. Step 5: Solve for x
    x = 14,071,582,734.61/135,612.61
  6. Step 6: Final answer
    x = 103,763.09

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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.