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Finding the Fourth Proportional to 148,897.74, 205,479.72 and 80,915.28

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Solution

The fourth proportional to 148,897.74, 205,479.72 and 80,915.28 is: 111,663.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,897.74 : 205,479.72 = 80,915.28 : x
  2. Step 2: Convert to fraction form
    148,897.74/205,479.72 = 80,915.28/x
  3. Step 3: Cross multiply
    148,897.74x = 205,479.72 × 80,915.28
  4. Step 4: Simplify right side
    148,897.74x = 16,626,449,078.12
  5. Step 5: Solve for x
    x = 16,626,449,078.12/148,897.74
  6. Step 6: Final answer
    x = 111,663.54

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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.