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Finding the Fourth Proportional to 118,698.60, 177,788.70 and 83,447.40

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Solution

The fourth proportional to 118,698.60, 177,788.70 and 83,447.40 is: 124,988.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,698.60 : 177,788.70 = 83,447.40 : x
  2. Step 2: Convert to fraction form
    118,698.60/177,788.70 = 83,447.40/x
  3. Step 3: Cross multiply
    118,698.60x = 177,788.70 × 83,447.40
  4. Step 4: Simplify right side
    118,698.60x = 14,836,004,764.38
  5. Step 5: Solve for x
    x = 14,836,004,764.38/118,698.60
  6. Step 6: Final answer
    x = 124,988.88

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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.