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Finding the Fourth Proportional to 74,091.72, 111,199.74 and 69,420.84

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Solution

The fourth proportional to 74,091.72, 111,199.74 and 69,420.84 is: 104,189.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,091.72 : 111,199.74 = 69,420.84 : x
  2. Step 2: Convert to fraction form
    74,091.72/111,199.74 = 69,420.84/x
  3. Step 3: Cross multiply
    74,091.72x = 111,199.74 × 69,420.84
  4. Step 4: Simplify right side
    74,091.72x = 7,719,579,358.58
  5. Step 5: Solve for x
    x = 7,719,579,358.58/74,091.72
  6. Step 6: Final answer
    x = 104,189.50

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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.