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Finding the Fourth Proportional to 83,274.70, 124,912.05 and 20,945.20

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Solution

The fourth proportional to 83,274.70, 124,912.05 and 20,945.20 is: 31,417.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,274.70 : 124,912.05 = 20,945.20 : x
  2. Step 2: Convert to fraction form
    83,274.70/124,912.05 = 20,945.20/x
  3. Step 3: Cross multiply
    83,274.70x = 124,912.05 × 20,945.20
  4. Step 4: Simplify right side
    83,274.70x = 2,616,307,869.66
  5. Step 5: Solve for x
    x = 2,616,307,869.66/83,274.70
  6. Step 6: Final answer
    x = 31,417.80

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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.