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Finding the Fourth Proportional to 74,189.80, 111,284.70 and 72,002.80

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Solution

The fourth proportional to 74,189.80, 111,284.70 and 72,002.80 is: 108,004.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,189.80 : 111,284.70 = 72,002.80 : x
  2. Step 2: Convert to fraction form
    74,189.80/111,284.70 = 72,002.80/x
  3. Step 3: Cross multiply
    74,189.80x = 111,284.70 × 72,002.80
  4. Step 4: Simplify right side
    74,189.80x = 8,012,809,997.16
  5. Step 5: Solve for x
    x = 8,012,809,997.16/74,189.80
  6. Step 6: Final answer
    x = 108,004.20

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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.