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Finding the Fourth Proportional to 108,608.70, 162,783.45 and 45,428.70

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Solution

The fourth proportional to 108,608.70, 162,783.45 and 45,428.70 is: 68,088.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,608.70 : 162,783.45 = 45,428.70 : x
  2. Step 2: Convert to fraction form
    108,608.70/162,783.45 = 45,428.70/x
  3. Step 3: Cross multiply
    108,608.70x = 162,783.45 × 45,428.70
  4. Step 4: Simplify right side
    108,608.70x = 7,395,040,515.02
  5. Step 5: Solve for x
    x = 7,395,040,515.02/108,608.70
  6. Step 6: Final answer
    x = 68,088.84

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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.