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Finding the Fourth Proportional to 122,492.40, 183,738.60 and 39,394.80

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Solution

The fourth proportional to 122,492.40, 183,738.60 and 39,394.80 is: 59,092.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,492.40 : 183,738.60 = 39,394.80 : x
  2. Step 2: Convert to fraction form
    122,492.40/183,738.60 = 39,394.80/x
  3. Step 3: Cross multiply
    122,492.40x = 183,738.60 × 39,394.80
  4. Step 4: Simplify right side
    122,492.40x = 7,238,345,399.28
  5. Step 5: Solve for x
    x = 7,238,345,399.28/122,492.40
  6. Step 6: Final answer
    x = 59,092.20

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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.