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Finding the Fourth Proportional to 212,684.28, 319,081.80 and 79,574.94

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Solution

The fourth proportional to 212,684.28, 319,081.80 and 79,574.94 is: 119,383.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,684.28 : 319,081.80 = 79,574.94 : x
  2. Step 2: Convert to fraction form
    212,684.28/319,081.80 = 79,574.94/x
  3. Step 3: Cross multiply
    212,684.28x = 319,081.80 × 79,574.94
  4. Step 4: Simplify right side
    212,684.28x = 25,390,915,090.09
  5. Step 5: Solve for x
    x = 25,390,915,090.09/212,684.28
  6. Step 6: Final answer
    x = 119,383.13

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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.