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Finding the Fourth Proportional to 73,964.79, 102,072.29 and 40,430.79

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Solution

The fourth proportional to 73,964.79, 102,072.29 and 40,430.79 is: 55,794.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,964.79 : 102,072.29 = 40,430.79 : x
  2. Step 2: Convert to fraction form
    73,964.79/102,072.29 = 40,430.79/x
  3. Step 3: Cross multiply
    73,964.79x = 102,072.29 × 40,430.79
  4. Step 4: Simplify right side
    73,964.79x = 4,126,863,119.66
  5. Step 5: Solve for x
    x = 4,126,863,119.66/73,964.79
  6. Step 6: Final answer
    x = 55,794.97

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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.