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Finding the Fourth Proportional to 293,081.20, 439,621.80 and 71,465.20

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Solution

The fourth proportional to 293,081.20, 439,621.80 and 71,465.20 is: 107,197.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,081.20 : 439,621.80 = 71,465.20 : x
  2. Step 2: Convert to fraction form
    293,081.20/439,621.80 = 71,465.20/x
  3. Step 3: Cross multiply
    293,081.20x = 439,621.80 × 71,465.20
  4. Step 4: Simplify right side
    293,081.20x = 31,417,659,861.36
  5. Step 5: Solve for x
    x = 31,417,659,861.36/293,081.20
  6. Step 6: Final answer
    x = 107,197.80

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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.