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Finding the Fourth Proportional to 72,977.03, 109,465.55 and 56,361.31

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Solution

The fourth proportional to 72,977.03, 109,465.55 and 56,361.31 is: 84,541.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,977.03 : 109,465.55 = 56,361.31 : x
  2. Step 2: Convert to fraction form
    72,977.03/109,465.55 = 56,361.31/x
  3. Step 3: Cross multiply
    72,977.03x = 109,465.55 × 56,361.31
  4. Step 4: Simplify right side
    72,977.03x = 6,169,621,797.87
  5. Step 5: Solve for x
    x = 6,169,621,797.87/72,977.03
  6. Step 6: Final answer
    x = 84,541.97

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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.