Home / 74,618.12-102,982.83-42,780.80

Finding the Fourth Proportional to 74,618.12, 102,982.83 and 42,780.80

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Solution

The fourth proportional to 74,618.12, 102,982.83 and 42,780.80 is: 59,043.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,618.12 : 102,982.83 = 42,780.80 : x
  2. Step 2: Convert to fraction form
    74,618.12/102,982.83 = 42,780.80/x
  3. Step 3: Cross multiply
    74,618.12x = 102,982.83 × 42,780.80
  4. Step 4: Simplify right side
    74,618.12x = 4,405,687,853.66
  5. Step 5: Solve for x
    x = 4,405,687,853.66/74,618.12
  6. Step 6: Final answer
    x = 59,043.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.