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Finding the Fourth Proportional to 50,959.45, 70,312.71 and 30,815.91

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Solution

The fourth proportional to 50,959.45, 70,312.71 and 30,815.91 is: 42,519.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,959.45 : 70,312.71 = 30,815.91 : x
  2. Step 2: Convert to fraction form
    50,959.45/70,312.71 = 30,815.91/x
  3. Step 3: Cross multiply
    50,959.45x = 70,312.71 × 30,815.91
  4. Step 4: Simplify right side
    50,959.45x = 2,166,749,791.65
  5. Step 5: Solve for x
    x = 2,166,749,791.65/50,959.45
  6. Step 6: Final answer
    x = 42,519.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.