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Finding the Fourth Proportional to 174,470.80, 261,706.20 and 139,478.80

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Solution

The fourth proportional to 174,470.80, 261,706.20 and 139,478.80 is: 209,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,470.80 : 261,706.20 = 139,478.80 : x
  2. Step 2: Convert to fraction form
    174,470.80/261,706.20 = 139,478.80/x
  3. Step 3: Cross multiply
    174,470.80x = 261,706.20 × 139,478.80
  4. Step 4: Simplify right side
    174,470.80x = 36,502,466,728.56
  5. Step 5: Solve for x
    x = 36,502,466,728.56/174,470.80
  6. Step 6: Final answer
    x = 209,218.20

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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.