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Finding the Fourth Proportional to 66,670.20, 100,005.30 and 48,007.80

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Solution

The fourth proportional to 66,670.20, 100,005.30 and 48,007.80 is: 72,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,670.20 : 100,005.30 = 48,007.80 : x
  2. Step 2: Convert to fraction form
    66,670.20/100,005.30 = 48,007.80/x
  3. Step 3: Cross multiply
    66,670.20x = 100,005.30 × 48,007.80
  4. Step 4: Simplify right side
    66,670.20x = 4,801,034,441.34
  5. Step 5: Solve for x
    x = 4,801,034,441.34/66,670.20
  6. Step 6: Final answer
    x = 72,011.70

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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.