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Finding the Fourth Proportional to 100,154.48, 138,156.60 and 71,481.20

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Solution

The fourth proportional to 100,154.48, 138,156.60 and 71,481.20 is: 98,603.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,154.48 : 138,156.60 = 71,481.20 : x
  2. Step 2: Convert to fraction form
    100,154.48/138,156.60 = 71,481.20/x
  3. Step 3: Cross multiply
    100,154.48x = 138,156.60 × 71,481.20
  4. Step 4: Simplify right side
    100,154.48x = 9,875,599,555.92
  5. Step 5: Solve for x
    x = 9,875,599,555.92/100,154.48
  6. Step 6: Final answer
    x = 98,603.67

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