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Finding the Fourth Proportional to 106,329.90, 159,456.45 and 53,721.90

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Solution

The fourth proportional to 106,329.90, 159,456.45 and 53,721.90 is: 80,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,329.90 : 159,456.45 = 53,721.90 : x
  2. Step 2: Convert to fraction form
    106,329.90/159,456.45 = 53,721.90/x
  3. Step 3: Cross multiply
    106,329.90x = 159,456.45 × 53,721.90
  4. Step 4: Simplify right side
    106,329.90x = 8,566,303,461.26
  5. Step 5: Solve for x
    x = 8,566,303,461.26/106,329.90
  6. Step 6: Final answer
    x = 80,563.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.