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Finding the Fourth Proportional to 118,185.68, 163,109.80 and 65,802.92

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Solution

The fourth proportional to 118,185.68, 163,109.80 and 65,802.92 is: 90,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,185.68 : 163,109.80 = 65,802.92 : x
  2. Step 2: Convert to fraction form
    118,185.68/163,109.80 = 65,802.92/x
  3. Step 3: Cross multiply
    118,185.68x = 163,109.80 × 65,802.92
  4. Step 4: Simplify right side
    118,185.68x = 10,733,100,387.32
  5. Step 5: Solve for x
    x = 10,733,100,387.32/118,185.68
  6. Step 6: Final answer
    x = 90,815.57

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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.