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Finding the Fourth Proportional to 66,428.91, 99,647.01 and 22,055.90

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Solution

The fourth proportional to 66,428.91, 99,647.01 and 22,055.90 is: 33,085.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.91 : 99,647.01 = 22,055.90 : x
  2. Step 2: Convert to fraction form
    66,428.91/99,647.01 = 22,055.90/x
  3. Step 3: Cross multiply
    66,428.91x = 99,647.01 × 22,055.90
  4. Step 4: Simplify right side
    66,428.91x = 2,197,803,989.62
  5. Step 5: Solve for x
    x = 2,197,803,989.62/66,428.91
  6. Step 6: Final answer
    x = 33,085.05

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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.