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Finding the Fourth Proportional to 56,905.44, 85,243.84 and 28,356.28

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Solution

The fourth proportional to 56,905.44, 85,243.84 and 28,356.28 is: 42,477.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,905.44 : 85,243.84 = 28,356.28 : x
  2. Step 2: Convert to fraction form
    56,905.44/85,243.84 = 28,356.28/x
  3. Step 3: Cross multiply
    56,905.44x = 85,243.84 × 28,356.28
  4. Step 4: Simplify right side
    56,905.44x = 2,417,198,195.32
  5. Step 5: Solve for x
    x = 2,417,198,195.32/56,905.44
  6. Step 6: Final answer
    x = 42,477.45

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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.