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Finding the Fourth Proportional to 173,831.80, 260,445.30 and 80,145.40

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Solution

The fourth proportional to 173,831.80, 260,445.30 and 80,145.40 is: 120,078.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,831.80 : 260,445.30 = 80,145.40 : x
  2. Step 2: Convert to fraction form
    173,831.80/260,445.30 = 80,145.40/x
  3. Step 3: Cross multiply
    173,831.80x = 260,445.30 × 80,145.40
  4. Step 4: Simplify right side
    173,831.80x = 20,873,492,746.62
  5. Step 5: Solve for x
    x = 20,873,492,746.62/173,831.80
  6. Step 6: Final answer
    x = 120,078.68

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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.