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Finding the Fourth Proportional to 83,139.60, 124,709.40 and 49,897.20

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Solution

The fourth proportional to 83,139.60, 124,709.40 and 49,897.20 is: 74,845.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,139.60 : 124,709.40 = 49,897.20 : x
  2. Step 2: Convert to fraction form
    83,139.60/124,709.40 = 49,897.20/x
  3. Step 3: Cross multiply
    83,139.60x = 124,709.40 × 49,897.20
  4. Step 4: Simplify right side
    83,139.60x = 6,222,649,873.68
  5. Step 5: Solve for x
    x = 6,222,649,873.68/83,139.60
  6. Step 6: Final answer
    x = 74,845.80

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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.