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Finding the Fourth Proportional to 78,775.88, 108,801.39 and 57,361.37

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Solution

The fourth proportional to 78,775.88, 108,801.39 and 57,361.37 is: 79,224.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,775.88 : 108,801.39 = 57,361.37 : x
  2. Step 2: Convert to fraction form
    78,775.88/108,801.39 = 57,361.37/x
  3. Step 3: Cross multiply
    78,775.88x = 108,801.39 × 57,361.37
  4. Step 4: Simplify right side
    78,775.88x = 6,240,996,459.40
  5. Step 5: Solve for x
    x = 6,240,996,459.40/78,775.88
  6. Step 6: Final answer
    x = 79,224.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.