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Finding the Fourth Proportional to 66,645.32, 99,973.82 and 27,205.16

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Solution

The fourth proportional to 66,645.32, 99,973.82 and 27,205.16 is: 40,810.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,645.32 : 99,973.82 = 27,205.16 : x
  2. Step 2: Convert to fraction form
    66,645.32/99,973.82 = 27,205.16/x
  3. Step 3: Cross multiply
    66,645.32x = 99,973.82 × 27,205.16
  4. Step 4: Simplify right side
    66,645.32x = 2,719,803,768.91
  5. Step 5: Solve for x
    x = 2,719,803,768.91/66,645.32
  6. Step 6: Final answer
    x = 40,810.12

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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.