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Finding the Fourth Proportional to 65,413.20, 91,381.20 and 65,413.20

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Solution

The fourth proportional to 65,413.20, 91,381.20 and 65,413.20 is: 91,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,413.20 : 91,381.20 = 65,413.20 : x
  2. Step 2: Convert to fraction form
    65,413.20/91,381.20 = 65,413.20/x
  3. Step 3: Cross multiply
    65,413.20x = 91,381.20 × 65,413.20
  4. Step 4: Simplify right side
    65,413.20x = 5,977,536,711.84
  5. Step 5: Solve for x
    x = 5,977,536,711.84/65,413.20
  6. Step 6: Final answer
    x = 91,381.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.