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Finding the Fourth Proportional to 67,995.60, 102,011.86 and 20,608.78

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Solution

The fourth proportional to 67,995.60, 102,011.86 and 20,608.78 is: 30,918.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,995.60 : 102,011.86 = 20,608.78 : x
  2. Step 2: Convert to fraction form
    67,995.60/102,011.86 = 20,608.78/x
  3. Step 3: Cross multiply
    67,995.60x = 102,011.86 × 20,608.78
  4. Step 4: Simplify right side
    67,995.60x = 2,102,339,980.13
  5. Step 5: Solve for x
    x = 2,102,339,980.13/67,995.60
  6. Step 6: Final answer
    x = 30,918.77

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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.