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Finding the Fourth Proportional to 72,820.65, 100,440.74 and 48,609.42

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Solution

The fourth proportional to 72,820.65, 100,440.74 and 48,609.42 is: 67,046.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,820.65 : 100,440.74 = 48,609.42 : x
  2. Step 2: Convert to fraction form
    72,820.65/100,440.74 = 48,609.42/x
  3. Step 3: Cross multiply
    72,820.65x = 100,440.74 × 48,609.42
  4. Step 4: Simplify right side
    72,820.65x = 4,882,365,872.72
  5. Step 5: Solve for x
    x = 4,882,365,872.72/72,820.65
  6. Step 6: Final answer
    x = 67,046.45

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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.