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Finding the Fourth Proportional to 112,461.76, 168,609.30 and 68,078.01

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Solution

The fourth proportional to 112,461.76, 168,609.30 and 68,078.01 is: 102,066.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,461.76 : 168,609.30 = 68,078.01 : x
  2. Step 2: Convert to fraction form
    112,461.76/168,609.30 = 68,078.01/x
  3. Step 3: Cross multiply
    112,461.76x = 168,609.30 × 68,078.01
  4. Step 4: Simplify right side
    112,461.76x = 11,478,585,611.49
  5. Step 5: Solve for x
    x = 11,478,585,611.49/112,461.76
  6. Step 6: Final answer
    x = 102,066.57

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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.