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Finding the Fourth Proportional to 316,030.23, 436,118.72 and 172,788.75

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Solution

The fourth proportional to 316,030.23, 436,118.72 and 172,788.75 is: 238,446.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,030.23 : 436,118.72 = 172,788.75 : x
  2. Step 2: Convert to fraction form
    316,030.23/436,118.72 = 172,788.75/x
  3. Step 3: Cross multiply
    316,030.23x = 436,118.72 × 172,788.75
  4. Step 4: Simplify right side
    316,030.23x = 75,356,408,480.40
  5. Step 5: Solve for x
    x = 75,356,408,480.40/316,030.23
  6. Step 6: Final answer
    x = 238,446.84

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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.