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Finding the Fourth Proportional to 122,970.40, 184,455.60 and 100,808.80

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Solution

The fourth proportional to 122,970.40, 184,455.60 and 100,808.80 is: 151,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,970.40 : 184,455.60 = 100,808.80 : x
  2. Step 2: Convert to fraction form
    122,970.40/184,455.60 = 100,808.80/x
  3. Step 3: Cross multiply
    122,970.40x = 184,455.60 × 100,808.80
  4. Step 4: Simplify right side
    122,970.40x = 18,594,747,689.28
  5. Step 5: Solve for x
    x = 18,594,747,689.28/122,970.40
  6. Step 6: Final answer
    x = 151,213.20

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1.5x scale

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.