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Finding the Fourth Proportional to 136,048.60, 203,902.80 and 69,515.20

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Solution

The fourth proportional to 136,048.60, 203,902.80 and 69,515.20 is: 104,185.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,048.60 : 203,902.80 = 69,515.20 : x
  2. Step 2: Convert to fraction form
    136,048.60/203,902.80 = 69,515.20/x
  3. Step 3: Cross multiply
    136,048.60x = 203,902.80 × 69,515.20
  4. Step 4: Simplify right side
    136,048.60x = 14,174,343,922.56
  5. Step 5: Solve for x
    x = 14,174,343,922.56/136,048.60
  6. Step 6: Final answer
    x = 104,185.89

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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.