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Finding the Fourth Proportional to 112,409.20, 168,586.80 and 64,921.60

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Solution

The fourth proportional to 112,409.20, 168,586.80 and 64,921.60 is: 97,366.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,409.20 : 168,586.80 = 64,921.60 : x
  2. Step 2: Convert to fraction form
    112,409.20/168,586.80 = 64,921.60/x
  3. Step 3: Cross multiply
    112,409.20x = 168,586.80 × 64,921.60
  4. Step 4: Simplify right side
    112,409.20x = 10,944,924,794.88
  5. Step 5: Solve for x
    x = 10,944,924,794.88/112,409.20
  6. Step 6: Final answer
    x = 97,366.81

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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.