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Finding the Fourth Proportional to 136,330.32, 188,122.44 and 79,730.64

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Solution

The fourth proportional to 136,330.32, 188,122.44 and 79,730.64 is: 110,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,330.32 : 188,122.44 = 79,730.64 : x
  2. Step 2: Convert to fraction form
    136,330.32/188,122.44 = 79,730.64/x
  3. Step 3: Cross multiply
    136,330.32x = 188,122.44 × 79,730.64
  4. Step 4: Simplify right side
    136,330.32x = 14,999,122,539.56
  5. Step 5: Solve for x
    x = 14,999,122,539.56/136,330.32
  6. Step 6: Final answer
    x = 110,020.45

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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.