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Finding the Fourth Proportional to 85,879.64, 118,509.74 and 47,640.71

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Solution

The fourth proportional to 85,879.64, 118,509.74 and 47,640.71 is: 65,741.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,879.64 : 118,509.74 = 47,640.71 : x
  2. Step 2: Convert to fraction form
    85,879.64/118,509.74 = 47,640.71/x
  3. Step 3: Cross multiply
    85,879.64x = 118,509.74 × 47,640.71
  4. Step 4: Simplify right side
    85,879.64x = 5,645,888,392.24
  5. Step 5: Solve for x
    x = 5,645,888,392.24/85,879.64
  6. Step 6: Final answer
    x = 65,741.87

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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.