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Finding the Fourth Proportional to 118,687.68, 163,636.20 and 76,230.72

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Solution

The fourth proportional to 118,687.68, 163,636.20 and 76,230.72 is: 105,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,687.68 : 163,636.20 = 76,230.72 : x
  2. Step 2: Convert to fraction form
    118,687.68/163,636.20 = 76,230.72/x
  3. Step 3: Cross multiply
    118,687.68x = 163,636.20 × 76,230.72
  4. Step 4: Simplify right side
    118,687.68x = 12,474,105,344.06
  5. Step 5: Solve for x
    x = 12,474,105,344.06/118,687.68
  6. Step 6: Final answer
    x = 105,100.25

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1.5x scale

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.