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Finding the Fourth Proportional to 486,174.79, 729,262.16 and 131,188.81

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Solution

The fourth proportional to 486,174.79, 729,262.16 and 131,188.81 is: 196,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,174.79 : 729,262.16 = 131,188.81 : x
  2. Step 2: Convert to fraction form
    486,174.79/729,262.16 = 131,188.81/x
  3. Step 3: Cross multiply
    486,174.79x = 729,262.16 × 131,188.81
  4. Step 4: Simplify right side
    486,174.79x = 95,671,034,948.43
  5. Step 5: Solve for x
    x = 95,671,034,948.43/486,174.79
  6. Step 6: Final answer
    x = 196,783.21

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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.