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Finding the Fourth Proportional to 72,940.64, 100,659.84 and 42,745.28

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Solution

The fourth proportional to 72,940.64, 100,659.84 and 42,745.28 is: 58,989.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,940.64 : 100,659.84 = 42,745.28 : x
  2. Step 2: Convert to fraction form
    72,940.64/100,659.84 = 42,745.28/x
  3. Step 3: Cross multiply
    72,940.64x = 100,659.84 × 42,745.28
  4. Step 4: Simplify right side
    72,940.64x = 4,302,733,045.56
  5. Step 5: Solve for x
    x = 4,302,733,045.56/72,940.64
  6. Step 6: Final answer
    x = 58,989.52

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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.