Home / 122,742.10-169,163.88-90,855.64

Finding the Fourth Proportional to 122,742.10, 169,163.88 and 90,855.64

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Solution

The fourth proportional to 122,742.10, 169,163.88 and 90,855.64 is: 125,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,742.10 : 169,163.88 = 90,855.64 : x
  2. Step 2: Convert to fraction form
    122,742.10/169,163.88 = 90,855.64/x
  3. Step 3: Cross multiply
    122,742.10x = 169,163.88 × 90,855.64
  4. Step 4: Simplify right side
    122,742.10x = 15,369,492,582.28
  5. Step 5: Solve for x
    x = 15,369,492,582.28/122,742.10
  6. Step 6: Final answer
    x = 125,217.77

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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.