Home / 81,011.40-121,517.10-56,079.60

Finding the Fourth Proportional to 81,011.40, 121,517.10 and 56,079.60

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Solution

The fourth proportional to 81,011.40, 121,517.10 and 56,079.60 is: 84,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,011.40 : 121,517.10 = 56,079.60 : x
  2. Step 2: Convert to fraction form
    81,011.40/121,517.10 = 56,079.60/x
  3. Step 3: Cross multiply
    81,011.40x = 121,517.10 × 56,079.60
  4. Step 4: Simplify right side
    81,011.40x = 6,814,630,361.16
  5. Step 5: Solve for x
    x = 6,814,630,361.16/81,011.40
  6. Step 6: Final answer
    x = 84,119.40

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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.