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Finding the Fourth Proportional to 68,661.80, 102,992.70 and 47,666.60

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Solution

The fourth proportional to 68,661.80, 102,992.70 and 47,666.60 is: 71,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,661.80 : 102,992.70 = 47,666.60 : x
  2. Step 2: Convert to fraction form
    68,661.80/102,992.70 = 47,666.60/x
  3. Step 3: Cross multiply
    68,661.80x = 102,992.70 × 47,666.60
  4. Step 4: Simplify right side
    68,661.80x = 4,909,311,833.82
  5. Step 5: Solve for x
    x = 4,909,311,833.82/68,661.80
  6. Step 6: Final answer
    x = 71,499.90

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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.