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Finding the Fourth Proportional to 118,039.68, 162,865.89 and 75,655.62

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Solution

The fourth proportional to 118,039.68, 162,865.89 and 75,655.62 is: 104,386.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,039.68 : 162,865.89 = 75,655.62 : x
  2. Step 2: Convert to fraction form
    118,039.68/162,865.89 = 75,655.62/x
  3. Step 3: Cross multiply
    118,039.68x = 162,865.89 × 75,655.62
  4. Step 4: Simplify right side
    118,039.68x = 12,321,719,884.80
  5. Step 5: Solve for x
    x = 12,321,719,884.80/118,039.68
  6. Step 6: Final answer
    x = 104,386.25

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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.