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Finding the Fourth Proportional to 122,457.32, 168,991.02 and 68,742.44

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Solution

The fourth proportional to 122,457.32, 168,991.02 and 68,742.44 is: 94,864.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,457.32 : 168,991.02 = 68,742.44 : x
  2. Step 2: Convert to fraction form
    122,457.32/168,991.02 = 68,742.44/x
  3. Step 3: Cross multiply
    122,457.32x = 168,991.02 × 68,742.44
  4. Step 4: Simplify right side
    122,457.32x = 11,616,855,052.89
  5. Step 5: Solve for x
    x = 11,616,855,052.89/122,457.32
  6. Step 6: Final answer
    x = 94,864.52

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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.