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Finding the Fourth Proportional to 219,899.71, 303,459.55 and 124,406.40

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Solution

The fourth proportional to 219,899.71, 303,459.55 and 124,406.40 is: 171,679.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,899.71 : 303,459.55 = 124,406.40 : x
  2. Step 2: Convert to fraction form
    219,899.71/303,459.55 = 124,406.40/x
  3. Step 3: Cross multiply
    219,899.71x = 303,459.55 × 124,406.40
  4. Step 4: Simplify right side
    219,899.71x = 37,752,309,850.10
  5. Step 5: Solve for x
    x = 37,752,309,850.10/219,899.71
  6. Step 6: Final answer
    x = 171,679.67

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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.