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Finding the Fourth Proportional to 67,858.39, 101,771.18 and 28,445

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Solution

The fourth proportional to 67,858.39, 101,771.18 and 28,445 is: 42,660.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,858.39 : 101,771.18 = 28,445 : x
  2. Step 2: Convert to fraction form
    67,858.39/101,771.18 = 28,445/x
  3. Step 3: Cross multiply
    67,858.39x = 101,771.18 × 28,445
  4. Step 4: Simplify right side
    67,858.39x = 2,894,881,072.88
  5. Step 5: Solve for x
    x = 2,894,881,072.88/67,858.39
  6. Step 6: Final answer
    x = 42,660.62

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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.