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Finding the Fourth Proportional to 125,999.20, 188,998.80 and 51,155.20

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Solution

The fourth proportional to 125,999.20, 188,998.80 and 51,155.20 is: 76,732.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,999.20 : 188,998.80 = 51,155.20 : x
  2. Step 2: Convert to fraction form
    125,999.20/188,998.80 = 51,155.20/x
  3. Step 3: Cross multiply
    125,999.20x = 188,998.80 × 51,155.20
  4. Step 4: Simplify right side
    125,999.20x = 9,668,271,413.76
  5. Step 5: Solve for x
    x = 9,668,271,413.76/125,999.20
  6. Step 6: Final answer
    x = 76,732.80

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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.