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Finding the Fourth Proportional to 145,861.70, 218,829.45 and 40,680.66

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Solution

The fourth proportional to 145,861.70, 218,829.45 and 40,680.66 is: 61,031.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,861.70 : 218,829.45 = 40,680.66 : x
  2. Step 2: Convert to fraction form
    145,861.70/218,829.45 = 40,680.66/x
  3. Step 3: Cross multiply
    145,861.70x = 218,829.45 × 40,680.66
  4. Step 4: Simplify right side
    145,861.70x = 8,902,126,453.44
  5. Step 5: Solve for x
    x = 8,902,126,453.44/145,861.70
  6. Step 6: Final answer
    x = 61,031.28

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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.