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Finding the Fourth Proportional to 128,914.40, 193,420.20 and 62,413.40

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Solution

The fourth proportional to 128,914.40, 193,420.20 and 62,413.40 is: 93,643.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.40 : 193,420.20 = 62,413.40 : x
  2. Step 2: Convert to fraction form
    128,914.40/193,420.20 = 62,413.40/x
  3. Step 3: Cross multiply
    128,914.40x = 193,420.20 × 62,413.40
  4. Step 4: Simplify right side
    128,914.40x = 12,072,012,310.68
  5. Step 5: Solve for x
    x = 12,072,012,310.68/128,914.40
  6. Step 6: Final answer
    x = 93,643.63

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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.