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Finding the Fourth Proportional to 81,698.42, 112,737.08 and 45,400.94

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Solution

The fourth proportional to 81,698.42, 112,737.08 and 45,400.94 is: 62,649.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,698.42 : 112,737.08 = 45,400.94 : x
  2. Step 2: Convert to fraction form
    81,698.42/112,737.08 = 45,400.94/x
  3. Step 3: Cross multiply
    81,698.42x = 112,737.08 × 45,400.94
  4. Step 4: Simplify right side
    81,698.42x = 5,118,369,377.44
  5. Step 5: Solve for x
    x = 5,118,369,377.44/81,698.42
  6. Step 6: Final answer
    x = 62,649.55

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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.