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Finding the Fourth Proportional to 118,281.60, 177,163.20 and 105,148.80

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Solution

The fourth proportional to 118,281.60, 177,163.20 and 105,148.80 is: 157,492.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,281.60 : 177,163.20 = 105,148.80 : x
  2. Step 2: Convert to fraction form
    118,281.60/177,163.20 = 105,148.80/x
  3. Step 3: Cross multiply
    118,281.60x = 177,163.20 × 105,148.80
  4. Step 4: Simplify right side
    118,281.60x = 18,628,497,884.16
  5. Step 5: Solve for x
    x = 18,628,497,884.16/118,281.60
  6. Step 6: Final answer
    x = 157,492.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.