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Finding the Fourth Proportional to 251,989.02, 347,749.02 and 138,811.86

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Solution

The fourth proportional to 251,989.02, 347,749.02 and 138,811.86 is: 191,562.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,989.02 : 347,749.02 = 138,811.86 : x
  2. Step 2: Convert to fraction form
    251,989.02/347,749.02 = 138,811.86/x
  3. Step 3: Cross multiply
    251,989.02x = 347,749.02 × 138,811.86
  4. Step 4: Simplify right side
    251,989.02x = 48,271,688,279.38
  5. Step 5: Solve for x
    x = 48,271,688,279.38/251,989.02
  6. Step 6: Final answer
    x = 191,562.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.