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Finding the Fourth Proportional to 82,712.70, 124,069.05 and 51,608.70

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Solution

The fourth proportional to 82,712.70, 124,069.05 and 51,608.70 is: 77,413.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,712.70 : 124,069.05 = 51,608.70 : x
  2. Step 2: Convert to fraction form
    82,712.70/124,069.05 = 51,608.70/x
  3. Step 3: Cross multiply
    82,712.70x = 124,069.05 × 51,608.70
  4. Step 4: Simplify right side
    82,712.70x = 6,403,042,380.74
  5. Step 5: Solve for x
    x = 6,403,042,380.74/82,712.70
  6. Step 6: Final answer
    x = 77,413.05

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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.