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Finding the Fourth Proportional to 118,339.84, 163,315.64 and 64,629.88

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Solution

The fourth proportional to 118,339.84, 163,315.64 and 64,629.88 is: 89,192.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,339.84 : 163,315.64 = 64,629.88 : x
  2. Step 2: Convert to fraction form
    118,339.84/163,315.64 = 64,629.88/x
  3. Step 3: Cross multiply
    118,339.84x = 163,315.64 × 64,629.88
  4. Step 4: Simplify right side
    118,339.84x = 10,555,070,215.32
  5. Step 5: Solve for x
    x = 10,555,070,215.32/118,339.84
  6. Step 6: Final answer
    x = 89,192.87

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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.