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Finding the Fourth Proportional to 74,585.72, 102,668.33 and 65,008.97

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Solution

The fourth proportional to 74,585.72, 102,668.33 and 65,008.97 is: 89,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,585.72 : 102,668.33 = 65,008.97 : x
  2. Step 2: Convert to fraction form
    74,585.72/102,668.33 = 65,008.97/x
  3. Step 3: Cross multiply
    74,585.72x = 102,668.33 × 65,008.97
  4. Step 4: Simplify right side
    74,585.72x = 6,674,362,384.92
  5. Step 5: Solve for x
    x = 6,674,362,384.92/74,585.72
  6. Step 6: Final answer
    x = 89,485.79

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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.