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Finding the Fourth Proportional to 122,690.40, 184,037.36 and 80,838.48

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Solution

The fourth proportional to 122,690.40, 184,037.36 and 80,838.48 is: 121,258.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,690.40 : 184,037.36 = 80,838.48 : x
  2. Step 2: Convert to fraction form
    122,690.40/184,037.36 = 80,838.48/x
  3. Step 3: Cross multiply
    122,690.40x = 184,037.36 × 80,838.48
  4. Step 4: Simplify right side
    122,690.40x = 14,877,300,445.61
  5. Step 5: Solve for x
    x = 14,877,300,445.61/122,690.40
  6. Step 6: Final answer
    x = 121,258.88

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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.