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Finding the Fourth Proportional to 161,874.90, 242,812.35 and 128,413.80

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Solution

The fourth proportional to 161,874.90, 242,812.35 and 128,413.80 is: 192,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,874.90 : 242,812.35 = 128,413.80 : x
  2. Step 2: Convert to fraction form
    161,874.90/242,812.35 = 128,413.80/x
  3. Step 3: Cross multiply
    161,874.90x = 242,812.35 × 128,413.80
  4. Step 4: Simplify right side
    161,874.90x = 31,180,456,550.43
  5. Step 5: Solve for x
    x = 31,180,456,550.43/161,874.90
  6. Step 6: Final answer
    x = 192,620.70

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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.