Home / 100,803.72-139,085.40-84,732.12

Finding the Fourth Proportional to 100,803.72, 139,085.40 and 84,732.12

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Solution

The fourth proportional to 100,803.72, 139,085.40 and 84,732.12 is: 116,910.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,803.72 : 139,085.40 = 84,732.12 : x
  2. Step 2: Convert to fraction form
    100,803.72/139,085.40 = 84,732.12/x
  3. Step 3: Cross multiply
    100,803.72x = 139,085.40 × 84,732.12
  4. Step 4: Simplify right side
    100,803.72x = 11,785,000,803.05
  5. Step 5: Solve for x
    x = 11,785,000,803.05/100,803.72
  6. Step 6: Final answer
    x = 116,910.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.