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Finding the Fourth Proportional to 85,620.37, 128,394.38 and 25,657.37

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Solution

The fourth proportional to 85,620.37, 128,394.38 and 25,657.37 is: 38,475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,620.37 : 128,394.38 = 25,657.37 : x
  2. Step 2: Convert to fraction form
    85,620.37/128,394.38 = 25,657.37/x
  3. Step 3: Cross multiply
    85,620.37x = 128,394.38 × 25,657.37
  4. Step 4: Simplify right side
    85,620.37x = 3,294,262,048.78
  5. Step 5: Solve for x
    x = 3,294,262,048.78/85,620.37
  6. Step 6: Final answer
    x = 38,475.22

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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.