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Finding the Fourth Proportional to 315,813.70, 473,579.83 and 91,120.71

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Solution

The fourth proportional to 315,813.70, 473,579.83 and 91,120.71 is: 136,640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,813.70 : 473,579.83 = 91,120.71 : x
  2. Step 2: Convert to fraction form
    315,813.70/473,579.83 = 91,120.71/x
  3. Step 3: Cross multiply
    315,813.70x = 473,579.83 × 91,120.71
  4. Step 4: Simplify right side
    315,813.70x = 43,152,932,241.10
  5. Step 5: Solve for x
    x = 43,152,932,241.10/315,813.70
  6. Step 6: Final answer
    x = 136,640.47

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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.