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Finding the Fourth Proportional to 72,548.44, 100,121.80 and 40,284.72

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Solution

The fourth proportional to 72,548.44, 100,121.80 and 40,284.72 is: 55,595.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,548.44 : 100,121.80 = 40,284.72 : x
  2. Step 2: Convert to fraction form
    72,548.44/100,121.80 = 40,284.72/x
  3. Step 3: Cross multiply
    72,548.44x = 100,121.80 × 40,284.72
  4. Step 4: Simplify right side
    72,548.44x = 4,033,378,678.90
  5. Step 5: Solve for x
    x = 4,033,378,678.90/72,548.44
  6. Step 6: Final answer
    x = 55,595.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.