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Finding the Fourth Proportional to 213,961.53, 320,992.95 and 69,866.64

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Solution

The fourth proportional to 213,961.53, 320,992.95 and 69,866.64 is: 104,816.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,961.53 : 320,992.95 = 69,866.64 : x
  2. Step 2: Convert to fraction form
    213,961.53/320,992.95 = 69,866.64/x
  3. Step 3: Cross multiply
    213,961.53x = 320,992.95 × 69,866.64
  4. Step 4: Simplify right side
    213,961.53x = 22,426,698,880.19
  5. Step 5: Solve for x
    x = 22,426,698,880.19/213,961.53
  6. Step 6: Final answer
    x = 104,816.50

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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.