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Finding the Fourth Proportional to 316,137.16, 436,266.30 and 172,895.68

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Solution

The fourth proportional to 316,137.16, 436,266.30 and 172,895.68 is: 238,594.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,137.16 : 436,266.30 = 172,895.68 : x
  2. Step 2: Convert to fraction form
    316,137.16/436,266.30 = 172,895.68/x
  3. Step 3: Cross multiply
    316,137.16x = 436,266.30 × 172,895.68
  4. Step 4: Simplify right side
    316,137.16x = 75,428,558,599.58
  5. Step 5: Solve for x
    x = 75,428,558,599.58/316,137.16
  6. Step 6: Final answer
    x = 238,594.41

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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.