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Finding the Fourth Proportional to 72,745.67, 109,047.74 and 34,785.07

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Solution

The fourth proportional to 72,745.67, 109,047.74 and 34,785.07 is: 52,143.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,745.67 : 109,047.74 = 34,785.07 : x
  2. Step 2: Convert to fraction form
    72,745.67/109,047.74 = 34,785.07/x
  3. Step 3: Cross multiply
    72,745.67x = 109,047.74 × 34,785.07
  4. Step 4: Simplify right side
    72,745.67x = 3,793,232,822.70
  5. Step 5: Solve for x
    x = 3,793,232,822.70/72,745.67
  6. Step 6: Final answer
    x = 52,143.76

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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.