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Finding the Fourth Proportional to 136,616.37, 188,531.69 and 76,190.91

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Solution

The fourth proportional to 136,616.37, 188,531.69 and 76,190.91 is: 105,144.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,616.37 : 188,531.69 = 76,190.91 : x
  2. Step 2: Convert to fraction form
    136,616.37/188,531.69 = 76,190.91/x
  3. Step 3: Cross multiply
    136,616.37x = 188,531.69 × 76,190.91
  4. Step 4: Simplify right side
    136,616.37x = 14,364,401,024.94
  5. Step 5: Solve for x
    x = 14,364,401,024.94/136,616.37
  6. Step 6: Final answer
    x = 105,144.07

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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.