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Finding the Fourth Proportional to 78,796.31, 117,579.89 and 70,304.45

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Solution

The fourth proportional to 78,796.31, 117,579.89 and 70,304.45 is: 104,908.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,796.31 : 117,579.89 = 70,304.45 : x
  2. Step 2: Convert to fraction form
    78,796.31/117,579.89 = 70,304.45/x
  3. Step 3: Cross multiply
    78,796.31x = 117,579.89 × 70,304.45
  4. Step 4: Simplify right side
    78,796.31x = 8,266,389,438.42
  5. Step 5: Solve for x
    x = 8,266,389,438.42/78,796.31
  6. Step 6: Final answer
    x = 104,908.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.