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Finding the Fourth Proportional to 72,668.56, 100,310.01 and 42,463.70

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Solution

The fourth proportional to 72,668.56, 100,310.01 and 42,463.70 is: 58,615.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,668.56 : 100,310.01 = 42,463.70 : x
  2. Step 2: Convert to fraction form
    72,668.56/100,310.01 = 42,463.70/x
  3. Step 3: Cross multiply
    72,668.56x = 100,310.01 × 42,463.70
  4. Step 4: Simplify right side
    72,668.56x = 4,259,533,670.09
  5. Step 5: Solve for x
    x = 4,259,533,670.09/72,668.56
  6. Step 6: Final answer
    x = 58,615.91

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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.