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Finding the Fourth Proportional to 66,187.99, 99,226.16 and 28,719.89

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Solution

The fourth proportional to 66,187.99, 99,226.16 and 28,719.89 is: 43,055.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,187.99 : 99,226.16 = 28,719.89 : x
  2. Step 2: Convert to fraction form
    66,187.99/99,226.16 = 28,719.89/x
  3. Step 3: Cross multiply
    66,187.99x = 99,226.16 × 28,719.89
  4. Step 4: Simplify right side
    66,187.99x = 2,849,764,400.32
  5. Step 5: Solve for x
    x = 2,849,764,400.32/66,187.99
  6. Step 6: Final answer
    x = 43,055.61

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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.