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Finding the Fourth Proportional to 70,350, 105,521.20 and 17,759.92

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Solution

The fourth proportional to 70,350, 105,521.20 and 17,759.92 is: 26,638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,350 : 105,521.20 = 17,759.92 : x
  2. Step 2: Convert to fraction form
    70,350/105,521.20 = 17,759.92/x
  3. Step 3: Cross multiply
    70,350x = 105,521.20 × 17,759.92
  4. Step 4: Simplify right side
    70,350x = 1,874,048,070.30
  5. Step 5: Solve for x
    x = 1,874,048,070.30/70,350
  6. Step 6: Final answer
    x = 26,638.92

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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.