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Finding the Fourth Proportional to 118,707.49, 163,816.50 and 64,992.88

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Solution

The fourth proportional to 118,707.49, 163,816.50 and 64,992.88 is: 89,690.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,707.49 : 163,816.50 = 64,992.88 : x
  2. Step 2: Convert to fraction form
    118,707.49/163,816.50 = 64,992.88/x
  3. Step 3: Cross multiply
    118,707.49x = 163,816.50 × 64,992.88
  4. Step 4: Simplify right side
    118,707.49x = 10,646,906,126.52
  5. Step 5: Solve for x
    x = 10,646,906,126.52/118,707.49
  6. Step 6: Final answer
    x = 89,690.26

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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.