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Finding the Fourth Proportional to 91,162.80, 136,695.60 and 38,512.80

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Solution

The fourth proportional to 91,162.80, 136,695.60 and 38,512.80 is: 57,748.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,162.80 : 136,695.60 = 38,512.80 : x
  2. Step 2: Convert to fraction form
    91,162.80/136,695.60 = 38,512.80/x
  3. Step 3: Cross multiply
    91,162.80x = 136,695.60 × 38,512.80
  4. Step 4: Simplify right side
    91,162.80x = 5,264,530,303.68
  5. Step 5: Solve for x
    x = 5,264,530,303.68/91,162.80
  6. Step 6: Final answer
    x = 57,748.67

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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.