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Finding the Fourth Proportional to 67,602.40, 101,413.20 and 20,850.40

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Solution

The fourth proportional to 67,602.40, 101,413.20 and 20,850.40 is: 31,278.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,602.40 : 101,413.20 = 20,850.40 : x
  2. Step 2: Convert to fraction form
    67,602.40/101,413.20 = 20,850.40/x
  3. Step 3: Cross multiply
    67,602.40x = 101,413.20 × 20,850.40
  4. Step 4: Simplify right side
    67,602.40x = 2,114,505,785.28
  5. Step 5: Solve for x
    x = 2,114,505,785.28/67,602.40
  6. Step 6: Final answer
    x = 31,278.56

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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.