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Finding the Fourth Proportional to 191,255.20, 286,774.80 and 72,930.40

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Solution

The fourth proportional to 191,255.20, 286,774.80 and 72,930.40 is: 109,354.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,255.20 : 286,774.80 = 72,930.40 : x
  2. Step 2: Convert to fraction form
    191,255.20/286,774.80 = 72,930.40/x
  3. Step 3: Cross multiply
    191,255.20x = 286,774.80 × 72,930.40
  4. Step 4: Simplify right side
    191,255.20x = 20,914,600,873.92
  5. Step 5: Solve for x
    x = 20,914,600,873.92/191,255.20
  6. Step 6: Final answer
    x = 109,354.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.