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Finding the Fourth Proportional to 122,078.40, 183,117.60 and 121,300.80

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Solution

The fourth proportional to 122,078.40, 183,117.60 and 121,300.80 is: 181,951.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,078.40 : 183,117.60 = 121,300.80 : x
  2. Step 2: Convert to fraction form
    122,078.40/183,117.60 = 121,300.80/x
  3. Step 3: Cross multiply
    122,078.40x = 183,117.60 × 121,300.80
  4. Step 4: Simplify right side
    122,078.40x = 22,212,311,374.08
  5. Step 5: Solve for x
    x = 22,212,311,374.08/122,078.40
  6. Step 6: Final answer
    x = 181,951.20

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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.