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Finding the Fourth Proportional to 72,976.78, 109,465.17 and 56,361.05

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Solution

The fourth proportional to 72,976.78, 109,465.17 and 56,361.05 is: 84,541.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,976.78 : 109,465.17 = 56,361.05 : x
  2. Step 2: Convert to fraction form
    72,976.78/109,465.17 = 56,361.05/x
  3. Step 3: Cross multiply
    72,976.78x = 109,465.17 × 56,361.05
  4. Step 4: Simplify right side
    72,976.78x = 6,169,571,919.63
  5. Step 5: Solve for x
    x = 6,169,571,919.63/72,976.78
  6. Step 6: Final answer
    x = 84,541.58

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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.