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Finding the Fourth Proportional to 213,059.30, 319,505.88 and 79,866.88

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Solution

The fourth proportional to 213,059.30, 319,505.88 and 79,866.88 is: 119,769.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,059.30 : 319,505.88 = 79,866.88 : x
  2. Step 2: Convert to fraction form
    213,059.30/319,505.88 = 79,866.88/x
  3. Step 3: Cross multiply
    213,059.30x = 319,505.88 × 79,866.88
  4. Step 4: Simplify right side
    213,059.30x = 25,517,937,777.25
  5. Step 5: Solve for x
    x = 25,517,937,777.25/213,059.30
  6. Step 6: Final answer
    x = 119,769.18

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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.