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Finding the Fourth Proportional to 105,659.58, 145,813.80 and 57,912.93

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Solution

The fourth proportional to 105,659.58, 145,813.80 and 57,912.93 is: 79,921.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,659.58 : 145,813.80 = 57,912.93 : x
  2. Step 2: Convert to fraction form
    105,659.58/145,813.80 = 57,912.93/x
  3. Step 3: Cross multiply
    105,659.58x = 145,813.80 × 57,912.93
  4. Step 4: Simplify right side
    105,659.58x = 8,444,504,392.43
  5. Step 5: Solve for x
    x = 8,444,504,392.43/105,659.58
  6. Step 6: Final answer
    x = 79,921.81

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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.