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Finding the Fourth Proportional to 53,955.60, 80,909.10 and 20,664.60

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Solution

The fourth proportional to 53,955.60, 80,909.10 and 20,664.60 is: 30,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,955.60 : 80,909.10 = 20,664.60 : x
  2. Step 2: Convert to fraction form
    53,955.60/80,909.10 = 20,664.60/x
  3. Step 3: Cross multiply
    53,955.60x = 80,909.10 × 20,664.60
  4. Step 4: Simplify right side
    53,955.60x = 1,671,954,187.86
  5. Step 5: Solve for x
    x = 1,671,954,187.86/53,955.60
  6. Step 6: Final answer
    x = 30,987.59

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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.