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Finding the Fourth Proportional to 126,071.40, 188,985.60 and 72,708.60

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Solution

The fourth proportional to 126,071.40, 188,985.60 and 72,708.60 is: 108,992.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,071.40 : 188,985.60 = 72,708.60 : x
  2. Step 2: Convert to fraction form
    126,071.40/188,985.60 = 72,708.60/x
  3. Step 3: Cross multiply
    126,071.40x = 188,985.60 × 72,708.60
  4. Step 4: Simplify right side
    126,071.40x = 13,740,878,396.16
  5. Step 5: Solve for x
    x = 13,740,878,396.16/126,071.40
  6. Step 6: Final answer
    x = 108,992.83

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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.