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Finding the Fourth Proportional to 318,077.82, 438,939.96 and 172,880.16

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Solution

The fourth proportional to 318,077.82, 438,939.96 and 172,880.16 is: 238,570.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,077.82 : 438,939.96 = 172,880.16 : x
  2. Step 2: Convert to fraction form
    318,077.82/438,939.96 = 172,880.16/x
  3. Step 3: Cross multiply
    318,077.82x = 438,939.96 × 172,880.16
  4. Step 4: Simplify right side
    318,077.82x = 75,884,010,515.19
  5. Step 5: Solve for x
    x = 75,884,010,515.19/318,077.82
  6. Step 6: Final answer
    x = 238,570.58

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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.