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Finding the Fourth Proportional to 122,620.08, 183,856.20 and 79,957.20

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Solution

The fourth proportional to 122,620.08, 183,856.20 and 79,957.20 is: 119,887.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,620.08 : 183,856.20 = 79,957.20 : x
  2. Step 2: Convert to fraction form
    122,620.08/183,856.20 = 79,957.20/x
  3. Step 3: Cross multiply
    122,620.08x = 183,856.20 × 79,957.20
  4. Step 4: Simplify right side
    122,620.08x = 14,700,626,954.64
  5. Step 5: Solve for x
    x = 14,700,626,954.64/122,620.08
  6. Step 6: Final answer
    x = 119,887.60

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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.