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Finding the Fourth Proportional to 70,134.21, 105,215.04 and 25,761.31

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Solution

The fourth proportional to 70,134.21, 105,215.04 and 25,761.31 is: 38,647.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,134.21 : 105,215.04 = 25,761.31 : x
  2. Step 2: Convert to fraction form
    70,134.21/105,215.04 = 25,761.31/x
  3. Step 3: Cross multiply
    70,134.21x = 105,215.04 × 25,761.31
  4. Step 4: Simplify right side
    70,134.21x = 2,710,476,999.06
  5. Step 5: Solve for x
    x = 2,710,476,999.06/70,134.21
  6. Step 6: Final answer
    x = 38,647.00

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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.