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Finding the Fourth Proportional to 118,835.64, 163,993.28 and 71,100.32

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Solution

The fourth proportional to 118,835.64, 163,993.28 and 71,100.32 is: 98,118.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,835.64 : 163,993.28 = 71,100.32 : x
  2. Step 2: Convert to fraction form
    118,835.64/163,993.28 = 71,100.32/x
  3. Step 3: Cross multiply
    118,835.64x = 163,993.28 × 71,100.32
  4. Step 4: Simplify right side
    118,835.64x = 11,659,973,510.38
  5. Step 5: Solve for x
    x = 11,659,973,510.38/118,835.64
  6. Step 6: Final answer
    x = 98,118.49

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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.