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Finding the Fourth Proportional to 197,643.20, 296,464.80 and 86,835.20

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Solution

The fourth proportional to 197,643.20, 296,464.80 and 86,835.20 is: 130,252.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,643.20 : 296,464.80 = 86,835.20 : x
  2. Step 2: Convert to fraction form
    197,643.20/296,464.80 = 86,835.20/x
  3. Step 3: Cross multiply
    197,643.20x = 296,464.80 × 86,835.20
  4. Step 4: Simplify right side
    197,643.20x = 25,743,580,200.96
  5. Step 5: Solve for x
    x = 25,743,580,200.96/197,643.20
  6. Step 6: Final answer
    x = 130,252.80

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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.