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Finding the Fourth Proportional to 118,390.91, 163,376.78 and 64,676.16

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Solution

The fourth proportional to 118,390.91, 163,376.78 and 64,676.16 is: 89,251.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,390.91 : 163,376.78 = 64,676.16 : x
  2. Step 2: Convert to fraction form
    118,390.91/163,376.78 = 64,676.16/x
  3. Step 3: Cross multiply
    118,390.91x = 163,376.78 × 64,676.16
  4. Step 4: Simplify right side
    118,390.91x = 10,566,582,440.18
  5. Step 5: Solve for x
    x = 10,566,582,440.18/118,390.91
  6. Step 6: Final answer
    x = 89,251.64

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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.