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Finding the Fourth Proportional to 316,186.88, 436,314.24 and 172,939.52

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Solution

The fourth proportional to 316,186.88, 436,314.24 and 172,939.52 is: 238,643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,186.88 : 436,314.24 = 172,939.52 : x
  2. Step 2: Convert to fraction form
    316,186.88/436,314.24 = 172,939.52/x
  3. Step 3: Cross multiply
    316,186.88x = 436,314.24 × 172,939.52
  4. Step 4: Simplify right side
    316,186.88x = 75,455,975,234.76
  5. Step 5: Solve for x
    x = 75,455,975,234.76/316,186.88
  6. Step 6: Final answer
    x = 238,643.60

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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.