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Finding the Fourth Proportional to 172,670.90, 259,041.50 and 72,831.47

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Solution

The fourth proportional to 172,670.90, 259,041.50 and 72,831.47 is: 109,262.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,670.90 : 259,041.50 = 72,831.47 : x
  2. Step 2: Convert to fraction form
    172,670.90/259,041.50 = 72,831.47/x
  3. Step 3: Cross multiply
    172,670.90x = 259,041.50 × 72,831.47
  4. Step 4: Simplify right side
    172,670.90x = 18,866,372,122.88
  5. Step 5: Solve for x
    x = 18,866,372,122.88/172,670.90
  6. Step 6: Final answer
    x = 109,262.03

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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.