Home / 100,516.55-138,715.02-55,197.45

Finding the Fourth Proportional to 100,516.55, 138,715.02 and 55,197.45

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Solution

The fourth proportional to 100,516.55, 138,715.02 and 55,197.45 is: 76,173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,516.55 : 138,715.02 = 55,197.45 : x
  2. Step 2: Convert to fraction form
    100,516.55/138,715.02 = 55,197.45/x
  3. Step 3: Cross multiply
    100,516.55x = 138,715.02 × 55,197.45
  4. Step 4: Simplify right side
    100,516.55x = 7,656,715,380.70
  5. Step 5: Solve for x
    x = 7,656,715,380.70/100,516.55
  6. Step 6: Final answer
    x = 76,173.68

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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.