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Finding the Fourth Proportional to 118,699.90, 163,807.82 and 64,984.03

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Solution

The fourth proportional to 118,699.90, 163,807.82 and 64,984.03 is: 89,679.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,699.90 : 163,807.82 = 64,984.03 : x
  2. Step 2: Convert to fraction form
    118,699.90/163,807.82 = 64,984.03/x
  3. Step 3: Cross multiply
    118,699.90x = 163,807.82 × 64,984.03
  4. Step 4: Simplify right side
    118,699.90x = 10,644,891,964.19
  5. Step 5: Solve for x
    x = 10,644,891,964.19/118,699.90
  6. Step 6: Final answer
    x = 89,679.03

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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.