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Finding the Fourth Proportional to 74,674.90, 111,939.45 and 66,801.70

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Solution

The fourth proportional to 74,674.90, 111,939.45 and 66,801.70 is: 100,137.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,674.90 : 111,939.45 = 66,801.70 : x
  2. Step 2: Convert to fraction form
    74,674.90/111,939.45 = 66,801.70/x
  3. Step 3: Cross multiply
    74,674.90x = 111,939.45 × 66,801.70
  4. Step 4: Simplify right side
    74,674.90x = 7,477,745,557.07
  5. Step 5: Solve for x
    x = 7,477,745,557.07/74,674.90
  6. Step 6: Final answer
    x = 100,137.34

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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.