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Finding the Fourth Proportional to 73,248.39, 109,875.29 and 20,659.28

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Solution

The fourth proportional to 73,248.39, 109,875.29 and 20,659.28 is: 30,989.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,248.39 : 109,875.29 = 20,659.28 : x
  2. Step 2: Convert to fraction form
    73,248.39/109,875.29 = 20,659.28/x
  3. Step 3: Cross multiply
    73,248.39x = 109,875.29 × 20,659.28
  4. Step 4: Simplify right side
    73,248.39x = 2,269,943,728.52
  5. Step 5: Solve for x
    x = 2,269,943,728.52/73,248.39
  6. Step 6: Final answer
    x = 30,989.67

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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.