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Finding the Fourth Proportional to 85,149.45, 117,509.87 and 47,423.70

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Solution

The fourth proportional to 85,149.45, 117,509.87 and 47,423.70 is: 65,446.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,149.45 : 117,509.87 = 47,423.70 : x
  2. Step 2: Convert to fraction form
    85,149.45/117,509.87 = 47,423.70/x
  3. Step 3: Cross multiply
    85,149.45x = 117,509.87 × 47,423.70
  4. Step 4: Simplify right side
    85,149.45x = 5,572,752,821.92
  5. Step 5: Solve for x
    x = 5,572,752,821.92/85,149.45
  6. Step 6: Final answer
    x = 65,446.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.