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Finding the Fourth Proportional to 85,107.72, 127,774.67 and 72,707.43

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Solution

The fourth proportional to 85,107.72, 127,774.67 and 72,707.43 is: 109,157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,107.72 : 127,774.67 = 72,707.43 : x
  2. Step 2: Convert to fraction form
    85,107.72/127,774.67 = 72,707.43/x
  3. Step 3: Cross multiply
    85,107.72x = 127,774.67 × 72,707.43
  4. Step 4: Simplify right side
    85,107.72x = 9,290,167,511.26
  5. Step 5: Solve for x
    x = 9,290,167,511.26/85,107.72
  6. Step 6: Final answer
    x = 109,157.75

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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.