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Finding the Fourth Proportional to 118,844.64, 163,999.20 and 65,129.76

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Solution

The fourth proportional to 118,844.64, 163,999.20 and 65,129.76 is: 89,875.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,844.64 : 163,999.20 = 65,129.76 : x
  2. Step 2: Convert to fraction form
    118,844.64/163,999.20 = 65,129.76/x
  3. Step 3: Cross multiply
    118,844.64x = 163,999.20 × 65,129.76
  4. Step 4: Simplify right side
    118,844.64x = 10,681,228,536.19
  5. Step 5: Solve for x
    x = 10,681,228,536.19/118,844.64
  6. Step 6: Final answer
    x = 89,875.56

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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.