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Finding the Fourth Proportional to 136,498.80, 188,484.72 and 85,597.20

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Solution

The fourth proportional to 136,498.80, 188,484.72 and 85,597.20 is: 118,197.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,498.80 : 188,484.72 = 85,597.20 : x
  2. Step 2: Convert to fraction form
    136,498.80/188,484.72 = 85,597.20/x
  3. Step 3: Cross multiply
    136,498.80x = 188,484.72 × 85,597.20
  4. Step 4: Simplify right side
    136,498.80x = 16,133,764,274.78
  5. Step 5: Solve for x
    x = 16,133,764,274.78/136,498.80
  6. Step 6: Final answer
    x = 118,197.11

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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.