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Finding the Fourth Proportional to 118,418.40, 177,368.40 and 102,866.40

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Solution

The fourth proportional to 118,418.40, 177,368.40 and 102,866.40 is: 154,074.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,418.40 : 177,368.40 = 102,866.40 : x
  2. Step 2: Convert to fraction form
    118,418.40/177,368.40 = 102,866.40/x
  3. Step 3: Cross multiply
    118,418.40x = 177,368.40 × 102,866.40
  4. Step 4: Simplify right side
    118,418.40x = 18,245,248,781.76
  5. Step 5: Solve for x
    x = 18,245,248,781.76/118,418.40
  6. Step 6: Final answer
    x = 154,074.44

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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.