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Finding the Fourth Proportional to 60,809.20, 91,213.80 and 38,647.60

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Solution

The fourth proportional to 60,809.20, 91,213.80 and 38,647.60 is: 57,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,809.20 : 91,213.80 = 38,647.60 : x
  2. Step 2: Convert to fraction form
    60,809.20/91,213.80 = 38,647.60/x
  3. Step 3: Cross multiply
    60,809.20x = 91,213.80 × 38,647.60
  4. Step 4: Simplify right side
    60,809.20x = 3,525,194,456.88
  5. Step 5: Solve for x
    x = 3,525,194,456.88/60,809.20
  6. Step 6: Final answer
    x = 57,971.40

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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.