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Finding the Fourth Proportional to 231,170.74, 318,925.51 and 145,079.49

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Solution

The fourth proportional to 231,170.74, 318,925.51 and 145,079.49 is: 200,153.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,170.74 : 318,925.51 = 145,079.49 : x
  2. Step 2: Convert to fraction form
    231,170.74/318,925.51 = 145,079.49/x
  3. Step 3: Cross multiply
    231,170.74x = 318,925.51 × 145,079.49
  4. Step 4: Simplify right side
    231,170.74x = 46,269,550,338.79
  5. Step 5: Solve for x
    x = 46,269,550,338.79/231,170.74
  6. Step 6: Final answer
    x = 200,153.14

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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.