Home / 80,949.60-121,424.40-70,581.60

Finding the Fourth Proportional to 80,949.60, 121,424.40 and 70,581.60

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Solution

The fourth proportional to 80,949.60, 121,424.40 and 70,581.60 is: 105,872.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,949.60 : 121,424.40 = 70,581.60 : x
  2. Step 2: Convert to fraction form
    80,949.60/121,424.40 = 70,581.60/x
  3. Step 3: Cross multiply
    80,949.60x = 121,424.40 × 70,581.60
  4. Step 4: Simplify right side
    80,949.60x = 8,570,328,431.04
  5. Step 5: Solve for x
    x = 8,570,328,431.04/80,949.60
  6. Step 6: Final answer
    x = 105,872.40

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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.