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Finding the Fourth Proportional to 86,740.71, 119,636.11 and 74,661.73

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Solution

The fourth proportional to 86,740.71, 119,636.11 and 74,661.73 is: 102,976.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,740.71 : 119,636.11 = 74,661.73 : x
  2. Step 2: Convert to fraction form
    86,740.71/119,636.11 = 74,661.73/x
  3. Step 3: Cross multiply
    86,740.71x = 119,636.11 × 74,661.73
  4. Step 4: Simplify right side
    86,740.71x = 8,932,238,943.07
  5. Step 5: Solve for x
    x = 8,932,238,943.07/86,740.71
  6. Step 6: Final answer
    x = 102,976.32

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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.