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Finding the Fourth Proportional to 212,560.45, 318,831.45 and 79,441.86

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Solution

The fourth proportional to 212,560.45, 318,831.45 and 79,441.86 is: 119,159.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,560.45 : 318,831.45 = 79,441.86 : x
  2. Step 2: Convert to fraction form
    212,560.45/318,831.45 = 79,441.86/x
  3. Step 3: Cross multiply
    212,560.45x = 318,831.45 × 79,441.86
  4. Step 4: Simplify right side
    212,560.45x = 25,328,563,414.50
  5. Step 5: Solve for x
    x = 25,328,563,414.50/212,560.45
  6. Step 6: Final answer
    x = 119,159.34

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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.