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Finding the Fourth Proportional to 108,011.40, 162,017.10 and 68,742.60

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Solution

The fourth proportional to 108,011.40, 162,017.10 and 68,742.60 is: 103,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,011.40 : 162,017.10 = 68,742.60 : x
  2. Step 2: Convert to fraction form
    108,011.40/162,017.10 = 68,742.60/x
  3. Step 3: Cross multiply
    108,011.40x = 162,017.10 × 68,742.60
  4. Step 4: Simplify right side
    108,011.40x = 11,137,476,698.46
  5. Step 5: Solve for x
    x = 11,137,476,698.46/108,011.40
  6. Step 6: Final answer
    x = 103,113.90

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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.