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Finding the Fourth Proportional to 50,685.90, 75,979.20 and 28,207.30

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Solution

The fourth proportional to 50,685.90, 75,979.20 and 28,207.30 is: 42,283.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,685.90 : 75,979.20 = 28,207.30 : x
  2. Step 2: Convert to fraction form
    50,685.90/75,979.20 = 28,207.30/x
  3. Step 3: Cross multiply
    50,685.90x = 75,979.20 × 28,207.30
  4. Step 4: Simplify right side
    50,685.90x = 2,143,168,244.58
  5. Step 5: Solve for x
    x = 2,143,168,244.58/50,685.90
  6. Step 6: Final answer
    x = 42,283.32

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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.