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Finding the Fourth Proportional to 136,534.89, 188,415 and 79,184.46

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Solution

The fourth proportional to 136,534.89, 188,415 and 79,184.46 is: 109,272.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,534.89 : 188,415 = 79,184.46 : x
  2. Step 2: Convert to fraction form
    136,534.89/188,415 = 79,184.46/x
  3. Step 3: Cross multiply
    136,534.89x = 188,415 × 79,184.46
  4. Step 4: Simplify right side
    136,534.89x = 14,919,540,030.90
  5. Step 5: Solve for x
    x = 14,919,540,030.90/136,534.89
  6. Step 6: Final answer
    x = 109,272.73

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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.