Home / 102,123.20-153,309.60-57,780.80

Finding the Fourth Proportional to 102,123.20, 153,309.60 and 57,780.80

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Solution

The fourth proportional to 102,123.20, 153,309.60 and 57,780.80 is: 86,741.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,123.20 : 153,309.60 = 57,780.80 : x
  2. Step 2: Convert to fraction form
    102,123.20/153,309.60 = 57,780.80/x
  3. Step 3: Cross multiply
    102,123.20x = 153,309.60 × 57,780.80
  4. Step 4: Simplify right side
    102,123.20x = 8,858,351,335.68
  5. Step 5: Solve for x
    x = 8,858,351,335.68/102,123.20
  6. Step 6: Final answer
    x = 86,741.81

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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.