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Finding the Fourth Proportional to 315,037.80, 472,433.85 and 137,423.70

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Solution

The fourth proportional to 315,037.80, 472,433.85 and 137,423.70 is: 206,081.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,037.80 : 472,433.85 = 137,423.70 : x
  2. Step 2: Convert to fraction form
    315,037.80/472,433.85 = 137,423.70/x
  3. Step 3: Cross multiply
    315,037.80x = 472,433.85 × 137,423.70
  4. Step 4: Simplify right side
    315,037.80x = 64,923,607,672.25
  5. Step 5: Solve for x
    x = 64,923,607,672.25/315,037.80
  6. Step 6: Final answer
    x = 206,081.96

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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.