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Finding the Fourth Proportional to 219,245.60, 328,740.78 and 85,969.64

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Solution

The fourth proportional to 219,245.60, 328,740.78 and 85,969.64 is: 128,904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,245.60 : 328,740.78 = 85,969.64 : x
  2. Step 2: Convert to fraction form
    219,245.60/328,740.78 = 85,969.64/x
  3. Step 3: Cross multiply
    219,245.60x = 328,740.78 × 85,969.64
  4. Step 4: Simplify right side
    219,245.60x = 28,261,726,509.92
  5. Step 5: Solve for x
    x = 28,261,726,509.92/219,245.60
  6. Step 6: Final answer
    x = 128,904.42

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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.