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Finding the Fourth Proportional to 118,725.40, 163,844.72 and 65,015.40

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Solution

The fourth proportional to 118,725.40, 163,844.72 and 65,015.40 is: 89,723.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,725.40 : 163,844.72 = 65,015.40 : x
  2. Step 2: Convert to fraction form
    118,725.40/163,844.72 = 65,015.40/x
  3. Step 3: Cross multiply
    118,725.40x = 163,844.72 × 65,015.40
  4. Step 4: Simplify right side
    118,725.40x = 10,652,430,008.69
  5. Step 5: Solve for x
    x = 10,652,430,008.69/118,725.40
  6. Step 6: Final answer
    x = 89,723.26

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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.