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Finding the Fourth Proportional to 113,472.30, 156,659.32 and 100,860.60

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Solution

The fourth proportional to 113,472.30, 156,659.32 and 100,860.60 is: 139,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,472.30 : 156,659.32 = 100,860.60 : x
  2. Step 2: Convert to fraction form
    113,472.30/156,659.32 = 100,860.60/x
  3. Step 3: Cross multiply
    113,472.30x = 156,659.32 × 100,860.60
  4. Step 4: Simplify right side
    113,472.30x = 15,800,753,010.79
  5. Step 5: Solve for x
    x = 15,800,753,010.79/113,472.30
  6. Step 6: Final answer
    x = 139,247.67

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1.5x scale

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.