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Finding the Fourth Proportional to 72,413.20, 108,619.80 and 48,912.40

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Solution

The fourth proportional to 72,413.20, 108,619.80 and 48,912.40 is: 73,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,413.20 : 108,619.80 = 48,912.40 : x
  2. Step 2: Convert to fraction form
    72,413.20/108,619.80 = 48,912.40/x
  3. Step 3: Cross multiply
    72,413.20x = 108,619.80 × 48,912.40
  4. Step 4: Simplify right side
    72,413.20x = 5,312,855,105.52
  5. Step 5: Solve for x
    x = 5,312,855,105.52/72,413.20
  6. Step 6: Final answer
    x = 73,368.60

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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.