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Finding the Fourth Proportional to 70,019.64, 105,072.90 and 28,466.52

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Solution

The fourth proportional to 70,019.64, 105,072.90 and 28,466.52 is: 42,717.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,019.64 : 105,072.90 = 28,466.52 : x
  2. Step 2: Convert to fraction form
    70,019.64/105,072.90 = 28,466.52/x
  3. Step 3: Cross multiply
    70,019.64x = 105,072.90 × 28,466.52
  4. Step 4: Simplify right side
    70,019.64x = 2,991,059,809.31
  5. Step 5: Solve for x
    x = 2,991,059,809.31/70,019.64
  6. Step 6: Final answer
    x = 42,717.44

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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.