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Finding the Fourth Proportional to 86,709.14, 119,623.20 and 68,732

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Solution

The fourth proportional to 86,709.14, 119,623.20 and 68,732 is: 94,822.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,709.14 : 119,623.20 = 68,732 : x
  2. Step 2: Convert to fraction form
    86,709.14/119,623.20 = 68,732/x
  3. Step 3: Cross multiply
    86,709.14x = 119,623.20 × 68,732
  4. Step 4: Simplify right side
    86,709.14x = 8,221,941,782.40
  5. Step 5: Solve for x
    x = 8,221,941,782.40/86,709.14
  6. Step 6: Final answer
    x = 94,822.09

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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.