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Finding the Fourth Proportional to 118,716.80, 163,828.58 and 65,000.84

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Solution

The fourth proportional to 118,716.80, 163,828.58 and 65,000.84 is: 89,700.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,716.80 : 163,828.58 = 65,000.84 : x
  2. Step 2: Convert to fraction form
    118,716.80/163,828.58 = 65,000.84/x
  3. Step 3: Cross multiply
    118,716.80x = 163,828.58 × 65,000.84
  4. Step 4: Simplify right side
    118,716.80x = 10,648,994,742.28
  5. Step 5: Solve for x
    x = 10,648,994,742.28/118,716.80
  6. Step 6: Final answer
    x = 89,700.83

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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.