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Finding the Fourth Proportional to 70,145.30, 105,263.99 and 25,772.42

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Solution

The fourth proportional to 70,145.30, 105,263.99 and 25,772.42 is: 38,675.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,145.30 : 105,263.99 = 25,772.42 : x
  2. Step 2: Convert to fraction form
    70,145.30/105,263.99 = 25,772.42/x
  3. Step 3: Cross multiply
    70,145.30x = 105,263.99 × 25,772.42
  4. Step 4: Simplify right side
    70,145.30x = 2,712,907,632.29
  5. Step 5: Solve for x
    x = 2,712,907,632.29/70,145.30
  6. Step 6: Final answer
    x = 38,675.54

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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.