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Finding the Fourth Proportional to 108,412.80, 162,388.80 and 89,980.80

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Solution

The fourth proportional to 108,412.80, 162,388.80 and 89,980.80 is: 134,779.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,412.80 : 162,388.80 = 89,980.80 : x
  2. Step 2: Convert to fraction form
    108,412.80/162,388.80 = 89,980.80/x
  3. Step 3: Cross multiply
    108,412.80x = 162,388.80 × 89,980.80
  4. Step 4: Simplify right side
    108,412.80x = 14,611,874,135.04
  5. Step 5: Solve for x
    x = 14,611,874,135.04/108,412.80
  6. Step 6: Final answer
    x = 134,779.97

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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.