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Finding the Fourth Proportional to 78,924.66, 108,915.89 and 45,396.98

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Solution

The fourth proportional to 78,924.66, 108,915.89 and 45,396.98 is: 62,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,924.66 : 108,915.89 = 45,396.98 : x
  2. Step 2: Convert to fraction form
    78,924.66/108,915.89 = 45,396.98/x
  3. Step 3: Cross multiply
    78,924.66x = 108,915.89 × 45,396.98
  4. Step 4: Simplify right side
    78,924.66x = 4,944,452,480.01
  5. Step 5: Solve for x
    x = 4,944,452,480.01/78,924.66
  6. Step 6: Final answer
    x = 62,647.75

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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.