Home / 80,555.81-121,076.11-66,605.18

Finding the Fourth Proportional to 80,555.81, 121,076.11 and 66,605.18

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Solution

The fourth proportional to 80,555.81, 121,076.11 and 66,605.18 is: 100,108.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,555.81 : 121,076.11 = 66,605.18 : x
  2. Step 2: Convert to fraction form
    80,555.81/121,076.11 = 66,605.18/x
  3. Step 3: Cross multiply
    80,555.81x = 121,076.11 × 66,605.18
  4. Step 4: Simplify right side
    80,555.81x = 8,064,296,100.25
  5. Step 5: Solve for x
    x = 8,064,296,100.25/80,555.81
  6. Step 6: Final answer
    x = 100,108.19

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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.