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Finding the Fourth Proportional to 65,481.84, 90,360.80 and 38,625.44

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Solution

The fourth proportional to 65,481.84, 90,360.80 and 38,625.44 is: 53,300.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,481.84 : 90,360.80 = 38,625.44 : x
  2. Step 2: Convert to fraction form
    65,481.84/90,360.80 = 38,625.44/x
  3. Step 3: Cross multiply
    65,481.84x = 90,360.80 × 38,625.44
  4. Step 4: Simplify right side
    65,481.84x = 3,490,225,658.75
  5. Step 5: Solve for x
    x = 3,490,225,658.75/65,481.84
  6. Step 6: Final answer
    x = 53,300.67

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1.5x scale

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.