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Finding the Fourth Proportional to 101,187.20, 151,780.80 and 81,504.20

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Solution

The fourth proportional to 101,187.20, 151,780.80 and 81,504.20 is: 122,256.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,187.20 : 151,780.80 = 81,504.20 : x
  2. Step 2: Convert to fraction form
    101,187.20/151,780.80 = 81,504.20/x
  3. Step 3: Cross multiply
    101,187.20x = 151,780.80 × 81,504.20
  4. Step 4: Simplify right side
    101,187.20x = 12,370,772,679.36
  5. Step 5: Solve for x
    x = 12,370,772,679.36/101,187.20
  6. Step 6: Final answer
    x = 122,256.30

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1.5x scale

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.