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Finding the Fourth Proportional to 56,617.70, 84,938.64 and 19,176.48

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Solution

The fourth proportional to 56,617.70, 84,938.64 and 19,176.48 is: 28,768.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,617.70 : 84,938.64 = 19,176.48 : x
  2. Step 2: Convert to fraction form
    56,617.70/84,938.64 = 19,176.48/x
  3. Step 3: Cross multiply
    56,617.70x = 84,938.64 × 19,176.48
  4. Step 4: Simplify right side
    56,617.70x = 1,628,824,131.19
  5. Step 5: Solve for x
    x = 1,628,824,131.19/56,617.70
  6. Step 6: Final answer
    x = 28,768.81

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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.