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Finding the Fourth Proportional to 136,485.58, 188,350.85 and 79,158.88

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Solution

The fourth proportional to 136,485.58, 188,350.85 and 79,158.88 is: 109,239.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,485.58 : 188,350.85 = 79,158.88 : x
  2. Step 2: Convert to fraction form
    136,485.58/188,350.85 = 79,158.88/x
  3. Step 3: Cross multiply
    136,485.58x = 188,350.85 × 79,158.88
  4. Step 4: Simplify right side
    136,485.58x = 14,909,642,333.05
  5. Step 5: Solve for x
    x = 14,909,642,333.05/136,485.58
  6. Step 6: Final answer
    x = 109,239.69

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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.