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Finding the Fourth Proportional to 78,413.58, 108,136.95 and 60,480.18

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Solution

The fourth proportional to 78,413.58, 108,136.95 and 60,480.18 is: 83,405.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,413.58 : 108,136.95 = 60,480.18 : x
  2. Step 2: Convert to fraction form
    78,413.58/108,136.95 = 60,480.18/x
  3. Step 3: Cross multiply
    78,413.58x = 108,136.95 × 60,480.18
  4. Step 4: Simplify right side
    78,413.58x = 6,540,142,200.65
  5. Step 5: Solve for x
    x = 6,540,142,200.65/78,413.58
  6. Step 6: Final answer
    x = 83,405.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.