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Finding the Fourth Proportional to 118,928.60, 164,123.04 and 65,213.48

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Solution

The fourth proportional to 118,928.60, 164,123.04 and 65,213.48 is: 89,995.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,928.60 : 164,123.04 = 65,213.48 : x
  2. Step 2: Convert to fraction form
    118,928.60/164,123.04 = 65,213.48/x
  3. Step 3: Cross multiply
    118,928.60x = 164,123.04 × 65,213.48
  4. Step 4: Simplify right side
    118,928.60x = 10,703,034,586.58
  5. Step 5: Solve for x
    x = 10,703,034,586.58/118,928.60
  6. Step 6: Final answer
    x = 89,995.46

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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.