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Finding the Fourth Proportional to 118,679.05, 163,771.86 and 64,965.16

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Solution

The fourth proportional to 118,679.05, 163,771.86 and 64,965.16 is: 89,649.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,679.05 : 163,771.86 = 64,965.16 : x
  2. Step 2: Convert to fraction form
    118,679.05/163,771.86 = 64,965.16/x
  3. Step 3: Cross multiply
    118,679.05x = 163,771.86 × 64,965.16
  4. Step 4: Simplify right side
    118,679.05x = 10,639,465,088.40
  5. Step 5: Solve for x
    x = 10,639,465,088.40/118,679.05
  6. Step 6: Final answer
    x = 89,649.06

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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.