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Finding the Fourth Proportional to 122,690.70, 184,036.05 and 72,924.30

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Solution

The fourth proportional to 122,690.70, 184,036.05 and 72,924.30 is: 109,386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,690.70 : 184,036.05 = 72,924.30 : x
  2. Step 2: Convert to fraction form
    122,690.70/184,036.05 = 72,924.30/x
  3. Step 3: Cross multiply
    122,690.70x = 184,036.05 × 72,924.30
  4. Step 4: Simplify right side
    122,690.70x = 13,420,700,121.02
  5. Step 5: Solve for x
    x = 13,420,700,121.02/122,690.70
  6. Step 6: Final answer
    x = 109,386.45

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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.