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Finding the Fourth Proportional to 215,999.40, 323,901.90 and 82,835.40

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Solution

The fourth proportional to 215,999.40, 323,901.90 and 82,835.40 is: 124,215.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,999.40 : 323,901.90 = 82,835.40 : x
  2. Step 2: Convert to fraction form
    215,999.40/323,901.90 = 82,835.40/x
  3. Step 3: Cross multiply
    215,999.40x = 323,901.90 × 82,835.40
  4. Step 4: Simplify right side
    215,999.40x = 26,830,543,447.26
  5. Step 5: Solve for x
    x = 26,830,543,447.26/215,999.40
  6. Step 6: Final answer
    x = 124,215.82

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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.