Home / 105,640.85-145,785.51-57,893.15

Finding the Fourth Proportional to 105,640.85, 145,785.51 and 57,893.15

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Solution

The fourth proportional to 105,640.85, 145,785.51 and 57,893.15 is: 79,893.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,640.85 : 145,785.51 = 57,893.15 : x
  2. Step 2: Convert to fraction form
    105,640.85/145,785.51 = 57,893.15/x
  3. Step 3: Cross multiply
    105,640.85x = 145,785.51 × 57,893.15
  4. Step 4: Simplify right side
    105,640.85x = 8,439,981,669.33
  5. Step 5: Solve for x
    x = 8,439,981,669.33/105,640.85
  6. Step 6: Final answer
    x = 79,893.17

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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.