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Finding the Fourth Proportional to 163,445.70, 225,530.02 and 91,811.87

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Solution

The fourth proportional to 163,445.70, 225,530.02 and 91,811.87 is: 126,686.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,445.70 : 225,530.02 = 91,811.87 : x
  2. Step 2: Convert to fraction form
    163,445.70/225,530.02 = 91,811.87/x
  3. Step 3: Cross multiply
    163,445.70x = 225,530.02 × 91,811.87
  4. Step 4: Simplify right side
    163,445.70x = 20,706,332,877.34
  5. Step 5: Solve for x
    x = 20,706,332,877.34/163,445.70
  6. Step 6: Final answer
    x = 126,686.31

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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.