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Finding the Fourth Proportional to 118,502.58, 163,533.65 and 64,786.74

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Solution

The fourth proportional to 118,502.58, 163,533.65 and 64,786.74 is: 89,405.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,502.58 : 163,533.65 = 64,786.74 : x
  2. Step 2: Convert to fraction form
    118,502.58/163,533.65 = 64,786.74/x
  3. Step 3: Cross multiply
    118,502.58x = 163,533.65 × 64,786.74
  4. Step 4: Simplify right side
    118,502.58x = 10,594,812,063.80
  5. Step 5: Solve for x
    x = 10,594,812,063.80/118,502.58
  6. Step 6: Final answer
    x = 89,405.75

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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.