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Finding the Fourth Proportional to 66,512.32, 99,766.04 and 19,763.98

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Solution

The fourth proportional to 66,512.32, 99,766.04 and 19,763.98 is: 29,645.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,512.32 : 99,766.04 = 19,763.98 : x
  2. Step 2: Convert to fraction form
    66,512.32/99,766.04 = 19,763.98/x
  3. Step 3: Cross multiply
    66,512.32x = 99,766.04 × 19,763.98
  4. Step 4: Simplify right side
    66,512.32x = 1,971,774,019.24
  5. Step 5: Solve for x
    x = 1,971,774,019.24/66,512.32
  6. Step 6: Final answer
    x = 29,645.24

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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.