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Finding the Fourth Proportional to 76,654.38, 105,784.66 and 43,120.38

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Solution

The fourth proportional to 76,654.38, 105,784.66 and 43,120.38 is: 59,507.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,654.38 : 105,784.66 = 43,120.38 : x
  2. Step 2: Convert to fraction form
    76,654.38/105,784.66 = 43,120.38/x
  3. Step 3: Cross multiply
    76,654.38x = 105,784.66 × 43,120.38
  4. Step 4: Simplify right side
    76,654.38x = 4,561,474,100.65
  5. Step 5: Solve for x
    x = 4,561,474,100.65/76,654.38
  6. Step 6: Final answer
    x = 59,507.03

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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.