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Finding the Fourth Proportional to 65,672.56, 90,634.80 and 38,823.76

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Solution

The fourth proportional to 65,672.56, 90,634.80 and 38,823.76 is: 53,580.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,672.56 : 90,634.80 = 38,823.76 : x
  2. Step 2: Convert to fraction form
    65,672.56/90,634.80 = 38,823.76/x
  3. Step 3: Cross multiply
    65,672.56x = 90,634.80 × 38,823.76
  4. Step 4: Simplify right side
    65,672.56x = 3,518,783,722.85
  5. Step 5: Solve for x
    x = 3,518,783,722.85/65,672.56
  6. Step 6: Final answer
    x = 53,580.73

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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.