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Finding the Fourth Proportional to 191,570.20, 287,355.30 and 73,245.40

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Solution

The fourth proportional to 191,570.20, 287,355.30 and 73,245.40 is: 109,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,570.20 : 287,355.30 = 73,245.40 : x
  2. Step 2: Convert to fraction form
    191,570.20/287,355.30 = 73,245.40/x
  3. Step 3: Cross multiply
    191,570.20x = 287,355.30 × 73,245.40
  4. Step 4: Simplify right side
    191,570.20x = 21,047,453,890.62
  5. Step 5: Solve for x
    x = 21,047,453,890.62/191,570.20
  6. Step 6: Final answer
    x = 109,868.10

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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.