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Finding the Fourth Proportional to 118,698.62, 163,804.13 and 64,987.05

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Solution

The fourth proportional to 118,698.62, 163,804.13 and 64,987.05 is: 89,682.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,698.62 : 163,804.13 = 64,987.05 : x
  2. Step 2: Convert to fraction form
    118,698.62/163,804.13 = 64,987.05/x
  3. Step 3: Cross multiply
    118,698.62x = 163,804.13 × 64,987.05
  4. Step 4: Simplify right side
    118,698.62x = 10,645,146,939.47
  5. Step 5: Solve for x
    x = 10,645,146,939.47/118,698.62
  6. Step 6: Final answer
    x = 89,682.15

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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.