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Finding the Fourth Proportional to 145,745.94, 218,125.12 and 89,621.60

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Solution

The fourth proportional to 145,745.94, 218,125.12 and 89,621.60 is: 134,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,745.94 : 218,125.12 = 89,621.60 : x
  2. Step 2: Convert to fraction form
    145,745.94/218,125.12 = 89,621.60/x
  3. Step 3: Cross multiply
    145,745.94x = 218,125.12 × 89,621.60
  4. Step 4: Simplify right side
    145,745.94x = 19,548,721,163.97
  5. Step 5: Solve for x
    x = 19,548,721,163.97/145,745.94
  6. Step 6: Final answer
    x = 134,128.76

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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.