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Finding the Fourth Proportional to 66,045.63, 99,065.00 and 21,666.54

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Solution

The fourth proportional to 66,045.63, 99,065.00 and 21,666.54 is: 32,498.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,045.63 : 99,065.00 = 21,666.54 : x
  2. Step 2: Convert to fraction form
    66,045.63/99,065.00 = 21,666.54/x
  3. Step 3: Cross multiply
    66,045.63x = 99,065.00 × 21,666.54
  4. Step 4: Simplify right side
    66,045.63x = 2,146,395,676.77
  5. Step 5: Solve for x
    x = 2,146,395,676.77/66,045.63
  6. Step 6: Final answer
    x = 32,498.68

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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.