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Finding the Fourth Proportional to 230,571.52, 318,189.28 and 128,603.60

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Solution

The fourth proportional to 230,571.52, 318,189.28 and 128,603.60 is: 177,473.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,571.52 : 318,189.28 = 128,603.60 : x
  2. Step 2: Convert to fraction form
    230,571.52/318,189.28 = 128,603.60/x
  3. Step 3: Cross multiply
    230,571.52x = 318,189.28 × 128,603.60
  4. Step 4: Simplify right side
    230,571.52x = 40,920,286,889.41
  5. Step 5: Solve for x
    x = 40,920,286,889.41/230,571.52
  6. Step 6: Final answer
    x = 177,473.29

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1.5x scale

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.