Home / 90,783.21-125,370.66-74,808.80

Finding the Fourth Proportional to 90,783.21, 125,370.66 and 74,808.80

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Solution

The fourth proportional to 90,783.21, 125,370.66 and 74,808.80 is: 103,310.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.21 : 125,370.66 = 74,808.80 : x
  2. Step 2: Convert to fraction form
    90,783.21/125,370.66 = 74,808.80/x
  3. Step 3: Cross multiply
    90,783.21x = 125,370.66 × 74,808.80
  4. Step 4: Simplify right side
    90,783.21x = 9,378,828,002.95
  5. Step 5: Solve for x
    x = 9,378,828,002.95/90,783.21
  6. Step 6: Final answer
    x = 103,310.16

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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.