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Finding the Fourth Proportional to 108,628.40, 163,072.20 and 61,281.20

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Solution

The fourth proportional to 108,628.40, 163,072.20 and 61,281.20 is: 91,994.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,628.40 : 163,072.20 = 61,281.20 : x
  2. Step 2: Convert to fraction form
    108,628.40/163,072.20 = 61,281.20/x
  3. Step 3: Cross multiply
    108,628.40x = 163,072.20 × 61,281.20
  4. Step 4: Simplify right side
    108,628.40x = 9,993,260,102.64
  5. Step 5: Solve for x
    x = 9,993,260,102.64/108,628.40
  6. Step 6: Final answer
    x = 91,994.91

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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.