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Finding the Fourth Proportional to 84,707.40, 127,072.86 and 28,563.60

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Solution

The fourth proportional to 84,707.40, 127,072.86 and 28,563.60 is: 42,849.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,707.40 : 127,072.86 = 28,563.60 : x
  2. Step 2: Convert to fraction form
    84,707.40/127,072.86 = 28,563.60/x
  3. Step 3: Cross multiply
    84,707.40x = 127,072.86 × 28,563.60
  4. Step 4: Simplify right side
    84,707.40x = 3,629,658,343.90
  5. Step 5: Solve for x
    x = 3,629,658,343.90/84,707.40
  6. Step 6: Final answer
    x = 42,849.37

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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.