Home / 80,885.40-121,328.10-74,664.60

Finding the Fourth Proportional to 80,885.40, 121,328.10 and 74,664.60

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Solution

The fourth proportional to 80,885.40, 121,328.10 and 74,664.60 is: 111,996.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,885.40 : 121,328.10 = 74,664.60 : x
  2. Step 2: Convert to fraction form
    80,885.40/121,328.10 = 74,664.60/x
  3. Step 3: Cross multiply
    80,885.40x = 121,328.10 × 74,664.60
  4. Step 4: Simplify right side
    80,885.40x = 9,058,914,055.26
  5. Step 5: Solve for x
    x = 9,058,914,055.26/80,885.40
  6. Step 6: Final answer
    x = 111,996.90

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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.