Home / 91,385.64-137,633.40-80,436.60

Finding the Fourth Proportional to 91,385.64, 137,633.40 and 80,436.60

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Solution

The fourth proportional to 91,385.64, 137,633.40 and 80,436.60 is: 121,143.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,385.64 : 137,633.40 = 80,436.60 : x
  2. Step 2: Convert to fraction form
    91,385.64/137,633.40 = 80,436.60/x
  3. Step 3: Cross multiply
    91,385.64x = 137,633.40 × 80,436.60
  4. Step 4: Simplify right side
    91,385.64x = 11,070,762,742.44
  5. Step 5: Solve for x
    x = 11,070,762,742.44/91,385.64
  6. Step 6: Final answer
    x = 121,143.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.