Home / 128,972.89-193,565.94-65,839.66

Finding the Fourth Proportional to 128,972.89, 193,565.94 and 65,839.66

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Solution

The fourth proportional to 128,972.89, 193,565.94 and 65,839.66 is: 98,813.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,972.89 : 193,565.94 = 65,839.66 : x
  2. Step 2: Convert to fraction form
    128,972.89/193,565.94 = 65,839.66/x
  3. Step 3: Cross multiply
    128,972.89x = 193,565.94 × 65,839.66
  4. Step 4: Simplify right side
    128,972.89x = 12,744,315,677.18
  5. Step 5: Solve for x
    x = 12,744,315,677.18/128,972.89
  6. Step 6: Final answer
    x = 98,813.91

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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.