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Finding the Fourth Proportional to 316,071.20, 436,175.20 and 172,829.76

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Solution

The fourth proportional to 316,071.20, 436,175.20 and 172,829.76 is: 238,503.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,071.20 : 436,175.20 = 172,829.76 : x
  2. Step 2: Convert to fraction form
    316,071.20/436,175.20 = 172,829.76/x
  3. Step 3: Cross multiply
    316,071.20x = 436,175.20 × 172,829.76
  4. Step 4: Simplify right side
    316,071.20x = 75,384,055,133.95
  5. Step 5: Solve for x
    x = 75,384,055,133.95/316,071.20
  6. Step 6: Final answer
    x = 238,503.40

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1.5x scale

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.