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Finding the Fourth Proportional to 108,120.45, 162,181.35 and 70,916.84

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Solution

The fourth proportional to 108,120.45, 162,181.35 and 70,916.84 is: 106,375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,120.45 : 162,181.35 = 70,916.84 : x
  2. Step 2: Convert to fraction form
    108,120.45/162,181.35 = 70,916.84/x
  3. Step 3: Cross multiply
    108,120.45x = 162,181.35 × 70,916.84
  4. Step 4: Simplify right side
    108,120.45x = 11,501,388,848.93
  5. Step 5: Solve for x
    x = 11,501,388,848.93/108,120.45
  6. Step 6: Final answer
    x = 106,375.70

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1.5x scale

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.