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Finding the Fourth Proportional to 70,381.38, 105,562.35 and 17,787.68

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Solution

The fourth proportional to 70,381.38, 105,562.35 and 17,787.68 is: 26,679.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,381.38 : 105,562.35 = 17,787.68 : x
  2. Step 2: Convert to fraction form
    70,381.38/105,562.35 = 17,787.68/x
  3. Step 3: Cross multiply
    70,381.38x = 105,562.35 × 17,787.68
  4. Step 4: Simplify right side
    70,381.38x = 1,877,708,774.04
  5. Step 5: Solve for x
    x = 1,877,708,774.04/70,381.38
  6. Step 6: Final answer
    x = 26,679.06

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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.