Home / 142,702.37-196,926.79-78,172.89

Finding the Fourth Proportional to 142,702.37, 196,926.79 and 78,172.89

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Solution

The fourth proportional to 142,702.37, 196,926.79 and 78,172.89 is: 107,877.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,702.37 : 196,926.79 = 78,172.89 : x
  2. Step 2: Convert to fraction form
    142,702.37/196,926.79 = 78,172.89/x
  3. Step 3: Cross multiply
    142,702.37x = 196,926.79 × 78,172.89
  4. Step 4: Simplify right side
    142,702.37x = 15,394,336,613.10
  5. Step 5: Solve for x
    x = 15,394,336,613.10/142,702.37
  6. Step 6: Final answer
    x = 107,877.23

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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.