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Finding the Fourth Proportional to 316,043.40, 436,136.92 and 172,801.92

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Solution

The fourth proportional to 316,043.40, 436,136.92 and 172,801.92 is: 238,465.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,043.40 : 436,136.92 = 172,801.92 : x
  2. Step 2: Convert to fraction form
    316,043.40/436,136.92 = 172,801.92/x
  3. Step 3: Cross multiply
    316,043.40x = 436,136.92 × 172,801.92
  4. Step 4: Simplify right side
    316,043.40x = 75,365,297,158.89
  5. Step 5: Solve for x
    x = 75,365,297,158.89/316,043.40
  6. Step 6: Final answer
    x = 238,465.02

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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.