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Finding the Fourth Proportional to 191,907.20, 287,493.60 and 103,131.20

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Solution

The fourth proportional to 191,907.20, 287,493.60 and 103,131.20 is: 154,499.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,907.20 : 287,493.60 = 103,131.20 : x
  2. Step 2: Convert to fraction form
    191,907.20/287,493.60 = 103,131.20/x
  3. Step 3: Cross multiply
    191,907.20x = 287,493.60 × 103,131.20
  4. Step 4: Simplify right side
    191,907.20x = 29,649,559,960.32
  5. Step 5: Solve for x
    x = 29,649,559,960.32/191,907.20
  6. Step 6: Final answer
    x = 154,499.47

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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.