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Finding the Fourth Proportional to 100,785.66, 151,173.01 and 30,659.50

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Solution

The fourth proportional to 100,785.66, 151,173.01 and 30,659.50 is: 45,987.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,785.66 : 151,173.01 = 30,659.50 : x
  2. Step 2: Convert to fraction form
    100,785.66/151,173.01 = 30,659.50/x
  3. Step 3: Cross multiply
    100,785.66x = 151,173.01 × 30,659.50
  4. Step 4: Simplify right side
    100,785.66x = 4,634,888,900.10
  5. Step 5: Solve for x
    x = 4,634,888,900.10/100,785.66
  6. Step 6: Final answer
    x = 45,987.58

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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.