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Finding the Fourth Proportional to 116,949.90, 161,379.50 and 65,970.66

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Solution

The fourth proportional to 116,949.90, 161,379.50 and 65,970.66 is: 91,033.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,949.90 : 161,379.50 = 65,970.66 : x
  2. Step 2: Convert to fraction form
    116,949.90/161,379.50 = 65,970.66/x
  3. Step 3: Cross multiply
    116,949.90x = 161,379.50 × 65,970.66
  4. Step 4: Simplify right side
    116,949.90x = 10,646,312,125.47
  5. Step 5: Solve for x
    x = 10,646,312,125.47/116,949.90
  6. Step 6: Final answer
    x = 91,033.10

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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.