Home / 135,803.42-187,431.92-78,432.44

Finding the Fourth Proportional to 135,803.42, 187,431.92 and 78,432.44

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Solution

The fourth proportional to 135,803.42, 187,431.92 and 78,432.44 is: 108,250.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,803.42 : 187,431.92 = 78,432.44 : x
  2. Step 2: Convert to fraction form
    135,803.42/187,431.92 = 78,432.44/x
  3. Step 3: Cross multiply
    135,803.42x = 187,431.92 × 78,432.44
  4. Step 4: Simplify right side
    135,803.42x = 14,700,741,784.28
  5. Step 5: Solve for x
    x = 14,700,741,784.28/135,803.42
  6. Step 6: Final answer
    x = 108,250.16

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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.