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Finding the Fourth Proportional to 118,898.80, 178,347.96 and 28,940.80

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Solution

The fourth proportional to 118,898.80, 178,347.96 and 28,940.80 is: 43,411.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,898.80 : 178,347.96 = 28,940.80 : x
  2. Step 2: Convert to fraction form
    118,898.80/178,347.96 = 28,940.80/x
  3. Step 3: Cross multiply
    118,898.80x = 178,347.96 × 28,940.80
  4. Step 4: Simplify right side
    118,898.80x = 5,161,532,640.77
  5. Step 5: Solve for x
    x = 5,161,532,640.77/118,898.80
  6. Step 6: Final answer
    x = 43,411.14

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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.