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Finding the Fourth Proportional to 128,341.64, 192,352.07 and 61,763.90

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Solution

The fourth proportional to 128,341.64, 192,352.07 and 61,763.90 is: 92,568.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,341.64 : 192,352.07 = 61,763.90 : x
  2. Step 2: Convert to fraction form
    128,341.64/192,352.07 = 61,763.90/x
  3. Step 3: Cross multiply
    128,341.64x = 192,352.07 × 61,763.90
  4. Step 4: Simplify right side
    128,341.64x = 11,880,412,745.69
  5. Step 5: Solve for x
    x = 11,880,412,745.69/128,341.64
  6. Step 6: Final answer
    x = 92,568.66

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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.