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Finding the Fourth Proportional to 128,854.21, 193,235 and 44,591.49

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Solution

The fourth proportional to 128,854.21, 193,235 and 44,591.49 is: 66,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,854.21 : 193,235 = 44,591.49 : x
  2. Step 2: Convert to fraction form
    128,854.21/193,235 = 44,591.49/x
  3. Step 3: Cross multiply
    128,854.21x = 193,235 × 44,591.49
  4. Step 4: Simplify right side
    128,854.21x = 8,616,636,570.15
  5. Step 5: Solve for x
    x = 8,616,636,570.15/128,854.21
  6. Step 6: Final answer
    x = 66,871.21

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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.