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Finding the Fourth Proportional to 76,745.32, 115,117.98 and 72,413.80

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Solution

The fourth proportional to 76,745.32, 115,117.98 and 72,413.80 is: 108,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,745.32 : 115,117.98 = 72,413.80 : x
  2. Step 2: Convert to fraction form
    76,745.32/115,117.98 = 72,413.80/x
  3. Step 3: Cross multiply
    76,745.32x = 115,117.98 × 72,413.80
  4. Step 4: Simplify right side
    76,745.32x = 8,336,130,380.12
  5. Step 5: Solve for x
    x = 8,336,130,380.12/76,745.32
  6. Step 6: Final answer
    x = 108,620.70

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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.