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Finding the Fourth Proportional to 107,638.40, 161,380.80 and 48,425.60

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Solution

The fourth proportional to 107,638.40, 161,380.80 and 48,425.60 is: 72,603.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,638.40 : 161,380.80 = 48,425.60 : x
  2. Step 2: Convert to fraction form
    107,638.40/161,380.80 = 48,425.60/x
  3. Step 3: Cross multiply
    107,638.40x = 161,380.80 × 48,425.60
  4. Step 4: Simplify right side
    107,638.40x = 7,814,962,068.48
  5. Step 5: Solve for x
    x = 7,814,962,068.48/107,638.40
  6. Step 6: Final answer
    x = 72,603.85

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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.