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Finding the Fourth Proportional to 77,491.50, 116,221.92 and 21,317.22

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Solution

The fourth proportional to 77,491.50, 116,221.92 and 21,317.22 is: 31,971.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,491.50 : 116,221.92 = 21,317.22 : x
  2. Step 2: Convert to fraction form
    77,491.50/116,221.92 = 21,317.22/x
  3. Step 3: Cross multiply
    77,491.50x = 116,221.92 × 21,317.22
  4. Step 4: Simplify right side
    77,491.50x = 2,477,528,237.46
  5. Step 5: Solve for x
    x = 2,477,528,237.46/77,491.50
  6. Step 6: Final answer
    x = 31,971.61

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1.5x scale

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.