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Finding the Fourth Proportional to 81,417.76, 122,144.16 and 25,256.74

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Solution

The fourth proportional to 81,417.76, 122,144.16 and 25,256.74 is: 37,890.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,417.76 : 122,144.16 = 25,256.74 : x
  2. Step 2: Convert to fraction form
    81,417.76/122,144.16 = 25,256.74/x
  3. Step 3: Cross multiply
    81,417.76x = 122,144.16 × 25,256.74
  4. Step 4: Simplify right side
    81,417.76x = 3,084,963,291.64
  5. Step 5: Solve for x
    x = 3,084,963,291.64/81,417.76
  6. Step 6: Final answer
    x = 37,890.54

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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.