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Finding the Fourth Proportional to 99,087.78, 148,636.54 and 39,915.44

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Solution

The fourth proportional to 99,087.78, 148,636.54 and 39,915.44 is: 59,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,087.78 : 148,636.54 = 39,915.44 : x
  2. Step 2: Convert to fraction form
    99,087.78/148,636.54 = 39,915.44/x
  3. Step 3: Cross multiply
    99,087.78x = 148,636.54 × 39,915.44
  4. Step 4: Simplify right side
    99,087.78x = 5,932,892,894.18
  5. Step 5: Solve for x
    x = 5,932,892,894.18/99,087.78
  6. Step 6: Final answer
    x = 59,875.12

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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.