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Finding the Fourth Proportional to 86,810, 119,583.48 and 74,021.54

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Solution

The fourth proportional to 86,810, 119,583.48 and 74,021.54 is: 101,966.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,810 : 119,583.48 = 74,021.54 : x
  2. Step 2: Convert to fraction form
    86,810/119,583.48 = 74,021.54/x
  3. Step 3: Cross multiply
    86,810x = 119,583.48 × 74,021.54
  4. Step 4: Simplify right side
    86,810x = 8,851,753,348.16
  5. Step 5: Solve for x
    x = 8,851,753,348.16/86,810
  6. Step 6: Final answer
    x = 101,966.98

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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.