Home / 74,979.32-103,471.20-40,987.80

Finding the Fourth Proportional to 74,979.32, 103,471.20 and 40,987.80

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Solution

The fourth proportional to 74,979.32, 103,471.20 and 40,987.80 is: 56,563.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,979.32 : 103,471.20 = 40,987.80 : x
  2. Step 2: Convert to fraction form
    74,979.32/103,471.20 = 40,987.80/x
  3. Step 3: Cross multiply
    74,979.32x = 103,471.20 × 40,987.80
  4. Step 4: Simplify right side
    74,979.32x = 4,241,056,851.36
  5. Step 5: Solve for x
    x = 4,241,056,851.36/74,979.32
  6. Step 6: Final answer
    x = 56,563.02

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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.