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Finding the Fourth Proportional to 139,472.84, 209,298.36 and 50,717.90

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Solution

The fourth proportional to 139,472.84, 209,298.36 and 50,717.90 is: 76,109.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,472.84 : 209,298.36 = 50,717.90 : x
  2. Step 2: Convert to fraction form
    139,472.84/209,298.36 = 50,717.90/x
  3. Step 3: Cross multiply
    139,472.84x = 209,298.36 × 50,717.90
  4. Step 4: Simplify right side
    139,472.84x = 10,615,173,292.64
  5. Step 5: Solve for x
    x = 10,615,173,292.64/139,472.84
  6. Step 6: Final answer
    x = 76,109.25

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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.