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Finding the Fourth Proportional to 72,655.37, 100,261.28 and 40,389.92

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Solution

The fourth proportional to 72,655.37, 100,261.28 and 40,389.92 is: 55,736.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,655.37 : 100,261.28 = 40,389.92 : x
  2. Step 2: Convert to fraction form
    72,655.37/100,261.28 = 40,389.92/x
  3. Step 3: Cross multiply
    72,655.37x = 100,261.28 × 40,389.92
  4. Step 4: Simplify right side
    72,655.37x = 4,049,544,544.77
  5. Step 5: Solve for x
    x = 4,049,544,544.77/72,655.37
  6. Step 6: Final answer
    x = 55,736.34

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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.