Home / 103,413.30-155,156.40-99,768.30

Finding the Fourth Proportional to 103,413.30, 155,156.40 and 99,768.30

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Solution

The fourth proportional to 103,413.30, 155,156.40 and 99,768.30 is: 149,687.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,413.30 : 155,156.40 = 99,768.30 : x
  2. Step 2: Convert to fraction form
    103,413.30/155,156.40 = 99,768.30/x
  3. Step 3: Cross multiply
    103,413.30x = 155,156.40 × 99,768.30
  4. Step 4: Simplify right side
    103,413.30x = 15,479,690,262.12
  5. Step 5: Solve for x
    x = 15,479,690,262.12/103,413.30
  6. Step 6: Final answer
    x = 149,687.62

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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.