Home / 105,706.50-145,879.38-57,961.68

Finding the Fourth Proportional to 105,706.50, 145,879.38 and 57,961.68

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Solution

The fourth proportional to 105,706.50, 145,879.38 and 57,961.68 is: 79,989.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,706.50 : 145,879.38 = 57,961.68 : x
  2. Step 2: Convert to fraction form
    105,706.50/145,879.38 = 57,961.68/x
  3. Step 3: Cross multiply
    105,706.50x = 145,879.38 × 57,961.68
  4. Step 4: Simplify right side
    105,706.50x = 8,455,413,942.16
  5. Step 5: Solve for x
    x = 8,455,413,942.16/105,706.50
  6. Step 6: Final answer
    x = 79,989.54

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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.