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Finding the Fourth Proportional to 113,679, 156,877.02 and 63,378

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Solution

The fourth proportional to 113,679, 156,877.02 and 63,378 is: 87,461.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,679 : 156,877.02 = 63,378 : x
  2. Step 2: Convert to fraction form
    113,679/156,877.02 = 63,378/x
  3. Step 3: Cross multiply
    113,679x = 156,877.02 × 63,378
  4. Step 4: Simplify right side
    113,679x = 9,942,551,773.56
  5. Step 5: Solve for x
    x = 9,942,551,773.56/113,679
  6. Step 6: Final answer
    x = 87,461.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.