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Finding the Fourth Proportional to 118,280.20, 177,420.30 and 84,929.80

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Solution

The fourth proportional to 118,280.20, 177,420.30 and 84,929.80 is: 127,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,280.20 : 177,420.30 = 84,929.80 : x
  2. Step 2: Convert to fraction form
    118,280.20/177,420.30 = 84,929.80/x
  3. Step 3: Cross multiply
    118,280.20x = 177,420.30 × 84,929.80
  4. Step 4: Simplify right side
    118,280.20x = 15,068,270,594.94
  5. Step 5: Solve for x
    x = 15,068,270,594.94/118,280.20
  6. Step 6: Final answer
    x = 127,394.70

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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.