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Finding the Fourth Proportional to 74,951.40, 112,556.70 and 72,618.60

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Solution

The fourth proportional to 74,951.40, 112,556.70 and 72,618.60 is: 109,053.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,951.40 : 112,556.70 = 72,618.60 : x
  2. Step 2: Convert to fraction form
    74,951.40/112,556.70 = 72,618.60/x
  3. Step 3: Cross multiply
    74,951.40x = 112,556.70 × 72,618.60
  4. Step 4: Simplify right side
    74,951.40x = 8,173,709,974.62
  5. Step 5: Solve for x
    x = 8,173,709,974.62/74,951.40
  6. Step 6: Final answer
    x = 109,053.47

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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.