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Finding the Fourth Proportional to 81,697.66, 122,651.44 and 62,989.58

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Solution

The fourth proportional to 81,697.66, 122,651.44 and 62,989.58 is: 94,565.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,697.66 : 122,651.44 = 62,989.58 : x
  2. Step 2: Convert to fraction form
    81,697.66/122,651.44 = 62,989.58/x
  3. Step 3: Cross multiply
    81,697.66x = 122,651.44 × 62,989.58
  4. Step 4: Simplify right side
    81,697.66x = 7,725,762,070.42
  5. Step 5: Solve for x
    x = 7,725,762,070.42/81,697.66
  6. Step 6: Final answer
    x = 94,565.28

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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.