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Finding the Fourth Proportional to 105,915.50, 146,176.36 and 61,203.50

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Solution

The fourth proportional to 105,915.50, 146,176.36 and 61,203.50 is: 84,468.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,915.50 : 146,176.36 = 61,203.50 : x
  2. Step 2: Convert to fraction form
    105,915.50/146,176.36 = 61,203.50/x
  3. Step 3: Cross multiply
    105,915.50x = 146,176.36 × 61,203.50
  4. Step 4: Simplify right side
    105,915.50x = 8,946,504,849.26
  5. Step 5: Solve for x
    x = 8,946,504,849.26/105,915.50
  6. Step 6: Final answer
    x = 84,468.32

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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.