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Finding the Fourth Proportional to 108,697.80, 162,852.30 and 91,979.40

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Solution

The fourth proportional to 108,697.80, 162,852.30 and 91,979.40 is: 137,804.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,697.80 : 162,852.30 = 91,979.40 : x
  2. Step 2: Convert to fraction form
    108,697.80/162,852.30 = 91,979.40/x
  3. Step 3: Cross multiply
    108,697.80x = 162,852.30 × 91,979.40
  4. Step 4: Simplify right side
    108,697.80x = 14,979,056,842.62
  5. Step 5: Solve for x
    x = 14,979,056,842.62/108,697.80
  6. Step 6: Final answer
    x = 137,804.60

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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.