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Finding the Fourth Proportional to 173,428.80, 260,143.20 and 111,220.80

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Solution

The fourth proportional to 173,428.80, 260,143.20 and 111,220.80 is: 166,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,428.80 : 260,143.20 = 111,220.80 : x
  2. Step 2: Convert to fraction form
    173,428.80/260,143.20 = 111,220.80/x
  3. Step 3: Cross multiply
    173,428.80x = 260,143.20 × 111,220.80
  4. Step 4: Simplify right side
    173,428.80x = 28,933,334,818.56
  5. Step 5: Solve for x
    x = 28,933,334,818.56/173,428.80
  6. Step 6: Final answer
    x = 166,831.20

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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.