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Finding the Fourth Proportional to 122,990.10, 184,485.15 and 120,657.30

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Solution

The fourth proportional to 122,990.10, 184,485.15 and 120,657.30 is: 180,985.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,990.10 : 184,485.15 = 120,657.30 : x
  2. Step 2: Convert to fraction form
    122,990.10/184,485.15 = 120,657.30/x
  3. Step 3: Cross multiply
    122,990.10x = 184,485.15 × 120,657.30
  4. Step 4: Simplify right side
    122,990.10x = 22,259,480,089.10
  5. Step 5: Solve for x
    x = 22,259,480,089.10/122,990.10
  6. Step 6: Final answer
    x = 180,985.95

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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.