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Finding the Fourth Proportional to 85,689.92, 118,188.37 and 55,451.91

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Solution

The fourth proportional to 85,689.92, 118,188.37 and 55,451.91 is: 76,482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,689.92 : 118,188.37 = 55,451.91 : x
  2. Step 2: Convert to fraction form
    85,689.92/118,188.37 = 55,451.91/x
  3. Step 3: Cross multiply
    85,689.92x = 118,188.37 × 55,451.91
  4. Step 4: Simplify right side
    85,689.92x = 6,553,770,392.08
  5. Step 5: Solve for x
    x = 6,553,770,392.08/85,689.92
  6. Step 6: Final answer
    x = 76,482.40

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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.