Home / 100,176.18-138,211.83-57,728.94

Finding the Fourth Proportional to 100,176.18, 138,211.83 and 57,728.94

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Solution

The fourth proportional to 100,176.18, 138,211.83 and 57,728.94 is: 79,647.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,176.18 : 138,211.83 = 57,728.94 : x
  2. Step 2: Convert to fraction form
    100,176.18/138,211.83 = 57,728.94/x
  3. Step 3: Cross multiply
    100,176.18x = 138,211.83 × 57,728.94
  4. Step 4: Simplify right side
    100,176.18x = 7,978,822,441.36
  5. Step 5: Solve for x
    x = 7,978,822,441.36/100,176.18
  6. Step 6: Final answer
    x = 79,647.90

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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.