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Finding the Fourth Proportional to 88,865.60, 133,300.80 and 38,920

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Solution

The fourth proportional to 88,865.60, 133,300.80 and 38,920 is: 58,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,865.60 : 133,300.80 = 38,920 : x
  2. Step 2: Convert to fraction form
    88,865.60/133,300.80 = 38,920/x
  3. Step 3: Cross multiply
    88,865.60x = 133,300.80 × 38,920
  4. Step 4: Simplify right side
    88,865.60x = 5,188,067,136
  5. Step 5: Solve for x
    x = 5,188,067,136/88,865.60
  6. Step 6: Final answer
    x = 58,381.05

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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.