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Finding the Fourth Proportional to 437,563.70, 656,345.55 and 105,139.70

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Solution

The fourth proportional to 437,563.70, 656,345.55 and 105,139.70 is: 157,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,563.70 : 656,345.55 = 105,139.70 : x
  2. Step 2: Convert to fraction form
    437,563.70/656,345.55 = 105,139.70/x
  3. Step 3: Cross multiply
    437,563.70x = 656,345.55 × 105,139.70
  4. Step 4: Simplify right side
    437,563.70x = 69,007,974,223.34
  5. Step 5: Solve for x
    x = 69,007,974,223.34/437,563.70
  6. Step 6: Final answer
    x = 157,709.55

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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.