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Finding the Fourth Proportional to 101,821.52, 152,655.48 and 66,770

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Solution

The fourth proportional to 101,821.52, 152,655.48 and 66,770 is: 100,104.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,821.52 : 152,655.48 = 66,770 : x
  2. Step 2: Convert to fraction form
    101,821.52/152,655.48 = 66,770/x
  3. Step 3: Cross multiply
    101,821.52x = 152,655.48 × 66,770
  4. Step 4: Simplify right side
    101,821.52x = 10,192,806,399.60
  5. Step 5: Solve for x
    x = 10,192,806,399.60/101,821.52
  6. Step 6: Final answer
    x = 100,104.64

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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.