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Finding the Fourth Proportional to 315,309.32, 435,136.08 and 172,078.56

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Solution

The fourth proportional to 315,309.32, 435,136.08 and 172,078.56 is: 237,473.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,309.32 : 435,136.08 = 172,078.56 : x
  2. Step 2: Convert to fraction form
    315,309.32/435,136.08 = 172,078.56/x
  3. Step 3: Cross multiply
    315,309.32x = 435,136.08 × 172,078.56
  4. Step 4: Simplify right side
    315,309.32x = 74,877,590,050.44
  5. Step 5: Solve for x
    x = 74,877,590,050.44/315,309.32
  6. Step 6: Final answer
    x = 237,473.44

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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.