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Finding the Fourth Proportional to 72,021.76, 108,071.52 and 35,085.76

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Solution

The fourth proportional to 72,021.76, 108,071.52 and 35,085.76 is: 52,647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.76 : 108,071.52 = 35,085.76 : x
  2. Step 2: Convert to fraction form
    72,021.76/108,071.52 = 35,085.76/x
  3. Step 3: Cross multiply
    72,021.76x = 108,071.52 × 35,085.76
  4. Step 4: Simplify right side
    72,021.76x = 3,791,771,413.56
  5. Step 5: Solve for x
    x = 3,791,771,413.56/72,021.76
  6. Step 6: Final answer
    x = 52,647.58

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1.5x scale

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.