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Finding the Fourth Proportional to 74,705.40, 111,985.20 and 66,832.20

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Solution

The fourth proportional to 74,705.40, 111,985.20 and 66,832.20 is: 100,183.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,705.40 : 111,985.20 = 66,832.20 : x
  2. Step 2: Convert to fraction form
    74,705.40/111,985.20 = 66,832.20/x
  3. Step 3: Cross multiply
    74,705.40x = 111,985.20 × 66,832.20
  4. Step 4: Simplify right side
    74,705.40x = 7,484,217,283.44
  5. Step 5: Solve for x
    x = 7,484,217,283.44/74,705.40
  6. Step 6: Final answer
    x = 100,183.08

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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.