Home / 131,821.86-181,914.21-72,205.86

Finding the Fourth Proportional to 131,821.86, 181,914.21 and 72,205.86

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Solution

The fourth proportional to 131,821.86, 181,914.21 and 72,205.86 is: 99,644.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,821.86 : 181,914.21 = 72,205.86 : x
  2. Step 2: Convert to fraction form
    131,821.86/181,914.21 = 72,205.86/x
  3. Step 3: Cross multiply
    131,821.86x = 181,914.21 × 72,205.86
  4. Step 4: Simplify right side
    131,821.86x = 13,135,271,979.27
  5. Step 5: Solve for x
    x = 13,135,271,979.27/131,821.86
  6. Step 6: Final answer
    x = 99,644.11

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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.