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Finding the Fourth Proportional to 136,700.80, 205,051.20 and 122,922.70

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Solution

The fourth proportional to 136,700.80, 205,051.20 and 122,922.70 is: 184,384.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,700.80 : 205,051.20 = 122,922.70 : x
  2. Step 2: Convert to fraction form
    136,700.80/205,051.20 = 122,922.70/x
  3. Step 3: Cross multiply
    136,700.80x = 205,051.20 × 122,922.70
  4. Step 4: Simplify right side
    136,700.80x = 25,205,447,142.24
  5. Step 5: Solve for x
    x = 25,205,447,142.24/136,700.80
  6. Step 6: Final answer
    x = 184,384.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.