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Finding the Fourth Proportional to 167,616.67, 251,258.93 and 78,711.03

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Solution

The fourth proportional to 167,616.67, 251,258.93 and 78,711.03 is: 117,988.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,616.67 : 251,258.93 = 78,711.03 : x
  2. Step 2: Convert to fraction form
    167,616.67/251,258.93 = 78,711.03/x
  3. Step 3: Cross multiply
    167,616.67x = 251,258.93 × 78,711.03
  4. Step 4: Simplify right side
    167,616.67x = 19,776,848,117.48
  5. Step 5: Solve for x
    x = 19,776,848,117.48/167,616.67
  6. Step 6: Final answer
    x = 117,988.55

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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.