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Finding the Fourth Proportional to 122,498.40, 183,747.60 and 39,400.80

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Solution

The fourth proportional to 122,498.40, 183,747.60 and 39,400.80 is: 59,101.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,498.40 : 183,747.60 = 39,400.80 : x
  2. Step 2: Convert to fraction form
    122,498.40/183,747.60 = 39,400.80/x
  3. Step 3: Cross multiply
    122,498.40x = 183,747.60 × 39,400.80
  4. Step 4: Simplify right side
    122,498.40x = 7,239,802,438.08
  5. Step 5: Solve for x
    x = 7,239,802,438.08/122,498.40
  6. Step 6: Final answer
    x = 59,101.20

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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.