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Finding the Fourth Proportional to 83,130.30, 124,696.08 and 20,800.80

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Solution

The fourth proportional to 83,130.30, 124,696.08 and 20,800.80 is: 31,201.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,130.30 : 124,696.08 = 20,800.80 : x
  2. Step 2: Convert to fraction form
    83,130.30/124,696.08 = 20,800.80/x
  3. Step 3: Cross multiply
    83,130.30x = 124,696.08 × 20,800.80
  4. Step 4: Simplify right side
    83,130.30x = 2,593,778,220.86
  5. Step 5: Solve for x
    x = 2,593,778,220.86/83,130.30
  6. Step 6: Final answer
    x = 31,201.36

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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.