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Finding the Fourth Proportional to 155,977.94, 215,249.55 and 84,357.96

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Solution

The fourth proportional to 155,977.94, 215,249.55 and 84,357.96 is: 116,413.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,977.94 : 215,249.55 = 84,357.96 : x
  2. Step 2: Convert to fraction form
    155,977.94/215,249.55 = 84,357.96/x
  3. Step 3: Cross multiply
    155,977.94x = 215,249.55 × 84,357.96
  4. Step 4: Simplify right side
    155,977.94x = 18,158,012,556.00
  5. Step 5: Solve for x
    x = 18,158,012,556.00/155,977.94
  6. Step 6: Final answer
    x = 116,413.98

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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.