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Finding the Fourth Proportional to 122,969.40, 184,454.10 and 100,807.80

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Solution

The fourth proportional to 122,969.40, 184,454.10 and 100,807.80 is: 151,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,969.40 : 184,454.10 = 100,807.80 : x
  2. Step 2: Convert to fraction form
    122,969.40/184,454.10 = 100,807.80/x
  3. Step 3: Cross multiply
    122,969.40x = 184,454.10 × 100,807.80
  4. Step 4: Simplify right side
    122,969.40x = 18,594,412,021.98
  5. Step 5: Solve for x
    x = 18,594,412,021.98/122,969.40
  6. Step 6: Final answer
    x = 151,211.70

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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.