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Finding the Fourth Proportional to 81,663.75, 122,495.63 and 26,259.75

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Solution

The fourth proportional to 81,663.75, 122,495.63 and 26,259.75 is: 39,389.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,663.75 : 122,495.63 = 26,259.75 : x
  2. Step 2: Convert to fraction form
    81,663.75/122,495.63 = 26,259.75/x
  3. Step 3: Cross multiply
    81,663.75x = 122,495.63 × 26,259.75
  4. Step 4: Simplify right side
    81,663.75x = 3,216,704,619.89
  5. Step 5: Solve for x
    x = 3,216,704,619.89/81,663.75
  6. Step 6: Final answer
    x = 39,389.63

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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.