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Finding the Fourth Proportional to 118,554.84, 163,609.20 and 64,838.88

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Solution

The fourth proportional to 118,554.84, 163,609.20 and 64,838.88 is: 89,479.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,554.84 : 163,609.20 = 64,838.88 : x
  2. Step 2: Convert to fraction form
    118,554.84/163,609.20 = 64,838.88/x
  3. Step 3: Cross multiply
    118,554.84x = 163,609.20 × 64,838.88
  4. Step 4: Simplify right side
    118,554.84x = 10,608,237,285.70
  5. Step 5: Solve for x
    x = 10,608,237,285.70/118,554.84
  6. Step 6: Final answer
    x = 89,479.58

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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.