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Finding the Fourth Proportional to 62,781.80, 94,172.70 and 21,228.80

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Solution

The fourth proportional to 62,781.80, 94,172.70 and 21,228.80 is: 31,843.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,781.80 : 94,172.70 = 21,228.80 : x
  2. Step 2: Convert to fraction form
    62,781.80/94,172.70 = 21,228.80/x
  3. Step 3: Cross multiply
    62,781.80x = 94,172.70 × 21,228.80
  4. Step 4: Simplify right side
    62,781.80x = 1,999,173,413.76
  5. Step 5: Solve for x
    x = 1,999,173,413.76/62,781.80
  6. Step 6: Final answer
    x = 31,843.20

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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.