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Finding the Fourth Proportional to 136,756.50, 188,731.35 and 80,186.10

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Solution

The fourth proportional to 136,756.50, 188,731.35 and 80,186.10 is: 110,661.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,756.50 : 188,731.35 = 80,186.10 : x
  2. Step 2: Convert to fraction form
    136,756.50/188,731.35 = 80,186.10/x
  3. Step 3: Cross multiply
    136,756.50x = 188,731.35 × 80,186.10
  4. Step 4: Simplify right side
    136,756.50x = 15,133,630,904.24
  5. Step 5: Solve for x
    x = 15,133,630,904.24/136,756.50
  6. Step 6: Final answer
    x = 110,661.15

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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.