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Finding the Fourth Proportional to 55,188.76, 82,774.74 and 20,128.44

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Solution

The fourth proportional to 55,188.76, 82,774.74 and 20,128.44 is: 30,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,188.76 : 82,774.74 = 20,128.44 : x
  2. Step 2: Convert to fraction form
    55,188.76/82,774.74 = 20,128.44/x
  3. Step 3: Cross multiply
    55,188.76x = 82,774.74 × 20,128.44
  4. Step 4: Simplify right side
    55,188.76x = 1,666,126,387.61
  5. Step 5: Solve for x
    x = 1,666,126,387.61/55,188.76
  6. Step 6: Final answer
    x = 30,189.60

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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.