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Finding the Fourth Proportional to 66,455.10, 99,701.85 and 19,709.10

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Solution

The fourth proportional to 66,455.10, 99,701.85 and 19,709.10 is: 29,569.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,455.10 : 99,701.85 = 19,709.10 : x
  2. Step 2: Convert to fraction form
    66,455.10/99,701.85 = 19,709.10/x
  3. Step 3: Cross multiply
    66,455.10x = 99,701.85 × 19,709.10
  4. Step 4: Simplify right side
    66,455.10x = 1,965,033,731.84
  5. Step 5: Solve for x
    x = 1,965,033,731.84/66,455.10
  6. Step 6: Final answer
    x = 29,569.34

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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.