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Finding the Fourth Proportional to 85,606.53, 128,222.55 and 43,413.90

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Solution

The fourth proportional to 85,606.53, 128,222.55 and 43,413.90 is: 65,025.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,606.53 : 128,222.55 = 43,413.90 : x
  2. Step 2: Convert to fraction form
    85,606.53/128,222.55 = 43,413.90/x
  3. Step 3: Cross multiply
    85,606.53x = 128,222.55 × 43,413.90
  4. Step 4: Simplify right side
    85,606.53x = 5,566,640,963.45
  5. Step 5: Solve for x
    x = 5,566,640,963.45/85,606.53
  6. Step 6: Final answer
    x = 65,025.89

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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.