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Finding the Fourth Proportional to 91,608.72, 126,413.40 and 51,315.64

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Solution

The fourth proportional to 91,608.72, 126,413.40 and 51,315.64 is: 70,811.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,608.72 : 126,413.40 = 51,315.64 : x
  2. Step 2: Convert to fraction form
    91,608.72/126,413.40 = 51,315.64/x
  3. Step 3: Cross multiply
    91,608.72x = 126,413.40 × 51,315.64
  4. Step 4: Simplify right side
    91,608.72x = 6,486,984,525.58
  5. Step 5: Solve for x
    x = 6,486,984,525.58/91,608.72
  6. Step 6: Final answer
    x = 70,811.87

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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.