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Finding the Fourth Proportional to 53,980.60, 80,861.55 and 30,579.70

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Solution

The fourth proportional to 53,980.60, 80,861.55 and 30,579.70 is: 45,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,980.60 : 80,861.55 = 30,579.70 : x
  2. Step 2: Convert to fraction form
    53,980.60/80,861.55 = 30,579.70/x
  3. Step 3: Cross multiply
    53,980.60x = 80,861.55 × 30,579.70
  4. Step 4: Simplify right side
    53,980.60x = 2,472,721,940.54
  5. Step 5: Solve for x
    x = 2,472,721,940.54/53,980.60
  6. Step 6: Final answer
    x = 45,807.60

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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.