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Finding the Fourth Proportional to 122,464.60, 169,008.72 and 81,558.60

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Solution

The fourth proportional to 122,464.60, 169,008.72 and 81,558.60 is: 112,555.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,464.60 : 169,008.72 = 81,558.60 : x
  2. Step 2: Convert to fraction form
    122,464.60/169,008.72 = 81,558.60/x
  3. Step 3: Cross multiply
    122,464.60x = 169,008.72 × 81,558.60
  4. Step 4: Simplify right side
    122,464.60x = 13,784,114,590.99
  5. Step 5: Solve for x
    x = 13,784,114,590.99/122,464.60
  6. Step 6: Final answer
    x = 112,555.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.