Home / 135,641.12-187,147.26-78,276.50

Finding the Fourth Proportional to 135,641.12, 187,147.26 and 78,276.50

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Solution

The fourth proportional to 135,641.12, 187,147.26 and 78,276.50 is: 107,999.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,641.12 : 187,147.26 = 78,276.50 : x
  2. Step 2: Convert to fraction form
    135,641.12/187,147.26 = 78,276.50/x
  3. Step 3: Cross multiply
    135,641.12x = 187,147.26 × 78,276.50
  4. Step 4: Simplify right side
    135,641.12x = 14,649,232,497.39
  5. Step 5: Solve for x
    x = 14,649,232,497.39/135,641.12
  6. Step 6: Final answer
    x = 107,999.94

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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.