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Finding the Fourth Proportional to 72,005.20, 107,818.80 and 50,830.90

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Solution

The fourth proportional to 72,005.20, 107,818.80 and 50,830.90 is: 76,112.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,005.20 : 107,818.80 = 50,830.90 : x
  2. Step 2: Convert to fraction form
    72,005.20/107,818.80 = 50,830.90/x
  3. Step 3: Cross multiply
    72,005.20x = 107,818.80 × 50,830.90
  4. Step 4: Simplify right side
    72,005.20x = 5,480,526,640.92
  5. Step 5: Solve for x
    x = 5,480,526,640.92/72,005.20
  6. Step 6: Final answer
    x = 76,112.93

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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.