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Finding the Fourth Proportional to 437,563.72, 656,345.58 and 105,139.72

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Solution

The fourth proportional to 437,563.72, 656,345.58 and 105,139.72 is: 157,709.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,563.72 : 656,345.58 = 105,139.72 : x
  2. Step 2: Convert to fraction form
    437,563.72/656,345.58 = 105,139.72/x
  3. Step 3: Cross multiply
    437,563.72x = 656,345.58 × 105,139.72
  4. Step 4: Simplify right side
    437,563.72x = 69,007,990,504.44
  5. Step 5: Solve for x
    x = 69,007,990,504.44/437,563.72
  6. Step 6: Final answer
    x = 157,709.58

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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.