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Finding the Fourth Proportional to 108,448.75, 149,638 and 68,139.16

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Solution

The fourth proportional to 108,448.75, 149,638 and 68,139.16 is: 94,018.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,448.75 : 149,638 = 68,139.16 : x
  2. Step 2: Convert to fraction form
    108,448.75/149,638 = 68,139.16/x
  3. Step 3: Cross multiply
    108,448.75x = 149,638 × 68,139.16
  4. Step 4: Simplify right side
    108,448.75x = 10,196,207,624.08
  5. Step 5: Solve for x
    x = 10,196,207,624.08/108,448.75
  6. Step 6: Final answer
    x = 94,018.67

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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.