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Finding the Fourth Proportional to 70,261.94, 105,434.40 and 25,919.66

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Solution

The fourth proportional to 70,261.94, 105,434.40 and 25,919.66 is: 38,894.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,261.94 : 105,434.40 = 25,919.66 : x
  2. Step 2: Convert to fraction form
    70,261.94/105,434.40 = 25,919.66/x
  3. Step 3: Cross multiply
    70,261.94x = 105,434.40 × 25,919.66
  4. Step 4: Simplify right side
    70,261.94x = 2,732,823,800.30
  5. Step 5: Solve for x
    x = 2,732,823,800.30/70,261.94
  6. Step 6: Final answer
    x = 38,894.80

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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.