Home / 80,954.90-121,432.35-72,425.60

Finding the Fourth Proportional to 80,954.90, 121,432.35 and 72,425.60

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Solution

The fourth proportional to 80,954.90, 121,432.35 and 72,425.60 is: 108,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,954.90 : 121,432.35 = 72,425.60 : x
  2. Step 2: Convert to fraction form
    80,954.90/121,432.35 = 72,425.60/x
  3. Step 3: Cross multiply
    80,954.90x = 121,432.35 × 72,425.60
  4. Step 4: Simplify right side
    80,954.90x = 8,794,810,808.16
  5. Step 5: Solve for x
    x = 8,794,810,808.16/80,954.90
  6. Step 6: Final answer
    x = 108,638.40

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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.