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Finding the Fourth Proportional to 135,999.88, 187,626.04 and 78,628.60

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Solution

The fourth proportional to 135,999.88, 187,626.04 and 78,628.60 is: 108,476.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,999.88 : 187,626.04 = 78,628.60 : x
  2. Step 2: Convert to fraction form
    135,999.88/187,626.04 = 78,628.60/x
  3. Step 3: Cross multiply
    135,999.88x = 187,626.04 × 78,628.60
  4. Step 4: Simplify right side
    135,999.88x = 14,752,772,848.74
  5. Step 5: Solve for x
    x = 14,752,772,848.74/135,999.88
  6. Step 6: Final answer
    x = 108,476.37

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1.5x scale

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.