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Finding the Fourth Proportional to 70,283.75, 105,425.73 and 28,730.75

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Solution

The fourth proportional to 70,283.75, 105,425.73 and 28,730.75 is: 43,096.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,283.75 : 105,425.73 = 28,730.75 : x
  2. Step 2: Convert to fraction form
    70,283.75/105,425.73 = 28,730.75/x
  3. Step 3: Cross multiply
    70,283.75x = 105,425.73 × 28,730.75
  4. Step 4: Simplify right side
    70,283.75x = 3,028,960,292.20
  5. Step 5: Solve for x
    x = 3,028,960,292.20/70,283.75
  6. Step 6: Final answer
    x = 43,096.17

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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.