Home / 72,749.36-109,123.74-20,158.70

Finding the Fourth Proportional to 72,749.36, 109,123.74 and 20,158.70

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Solution

The fourth proportional to 72,749.36, 109,123.74 and 20,158.70 is: 30,237.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,749.36 : 109,123.74 = 20,158.70 : x
  2. Step 2: Convert to fraction form
    72,749.36/109,123.74 = 20,158.70/x
  3. Step 3: Cross multiply
    72,749.36x = 109,123.74 × 20,158.70
  4. Step 4: Simplify right side
    72,749.36x = 2,199,792,191.92
  5. Step 5: Solve for x
    x = 2,199,792,191.92/72,749.36
  6. Step 6: Final answer
    x = 30,237.96

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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.