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Finding the Fourth Proportional to 198,915.78, 298,373.67 and 58,663.47

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Solution

The fourth proportional to 198,915.78, 298,373.67 and 58,663.47 is: 87,995.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,915.78 : 298,373.67 = 58,663.47 : x
  2. Step 2: Convert to fraction form
    198,915.78/298,373.67 = 58,663.47/x
  3. Step 3: Cross multiply
    198,915.78x = 298,373.67 × 58,663.47
  4. Step 4: Simplify right side
    198,915.78x = 17,503,634,838.83
  5. Step 5: Solve for x
    x = 17,503,634,838.83/198,915.78
  6. Step 6: Final answer
    x = 87,995.21

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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.