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Finding the Fourth Proportional to 83,271.66, 124,907.40 and 20,942.16

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Solution

The fourth proportional to 83,271.66, 124,907.40 and 20,942.16 is: 31,413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,271.66 : 124,907.40 = 20,942.16 : x
  2. Step 2: Convert to fraction form
    83,271.66/124,907.40 = 20,942.16/x
  3. Step 3: Cross multiply
    83,271.66x = 124,907.40 × 20,942.16
  4. Step 4: Simplify right side
    83,271.66x = 2,615,830,755.98
  5. Step 5: Solve for x
    x = 2,615,830,755.98/83,271.66
  6. Step 6: Final answer
    x = 31,413.22

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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.