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Finding the Fourth Proportional to 72,274.85, 108,408.93 and 18,965.51

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Solution

The fourth proportional to 72,274.85, 108,408.93 and 18,965.51 is: 28,447.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,274.85 : 108,408.93 = 18,965.51 : x
  2. Step 2: Convert to fraction form
    72,274.85/108,408.93 = 18,965.51/x
  3. Step 3: Cross multiply
    72,274.85x = 108,408.93 × 18,965.51
  4. Step 4: Simplify right side
    72,274.85x = 2,056,030,009.13
  5. Step 5: Solve for x
    x = 2,056,030,009.13/72,274.85
  6. Step 6: Final answer
    x = 28,447.38

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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.