Home / 80,931.56-121,395.90-30,998.12

Finding the Fourth Proportional to 80,931.56, 121,395.90 and 30,998.12

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Solution

The fourth proportional to 80,931.56, 121,395.90 and 30,998.12 is: 46,496.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,931.56 : 121,395.90 = 30,998.12 : x
  2. Step 2: Convert to fraction form
    80,931.56/121,395.90 = 30,998.12/x
  3. Step 3: Cross multiply
    80,931.56x = 121,395.90 × 30,998.12
  4. Step 4: Simplify right side
    80,931.56x = 3,763,044,675.71
  5. Step 5: Solve for x
    x = 3,763,044,675.71/80,931.56
  6. Step 6: Final answer
    x = 46,496.63

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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.