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Finding the Fourth Proportional to 83,271.70, 124,907.55 and 20,942.20

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Solution

The fourth proportional to 83,271.70, 124,907.55 and 20,942.20 is: 31,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,271.70 : 124,907.55 = 20,942.20 : x
  2. Step 2: Convert to fraction form
    83,271.70/124,907.55 = 20,942.20/x
  3. Step 3: Cross multiply
    83,271.70x = 124,907.55 × 20,942.20
  4. Step 4: Simplify right side
    83,271.70x = 2,615,838,893.61
  5. Step 5: Solve for x
    x = 2,615,838,893.61/83,271.70
  6. Step 6: Final answer
    x = 31,413.30

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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.