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Finding the Fourth Proportional to 81,277.40, 121,916.10 and 41,911.40

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Solution

The fourth proportional to 81,277.40, 121,916.10 and 41,911.40 is: 62,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,277.40 : 121,916.10 = 41,911.40 : x
  2. Step 2: Convert to fraction form
    81,277.40/121,916.10 = 41,911.40/x
  3. Step 3: Cross multiply
    81,277.40x = 121,916.10 × 41,911.40
  4. Step 4: Simplify right side
    81,277.40x = 5,109,674,433.54
  5. Step 5: Solve for x
    x = 5,109,674,433.54/81,277.40
  6. Step 6: Final answer
    x = 62,867.10

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1.5x scale

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.