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Finding the Fourth Proportional to 66,513.96, 99,770.64 and 22,140.64

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Solution

The fourth proportional to 66,513.96, 99,770.64 and 22,140.64 is: 33,210.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,513.96 : 99,770.64 = 22,140.64 : x
  2. Step 2: Convert to fraction form
    66,513.96/99,770.64 = 22,140.64/x
  3. Step 3: Cross multiply
    66,513.96x = 99,770.64 × 22,140.64
  4. Step 4: Simplify right side
    66,513.96x = 2,208,985,864.50
  5. Step 5: Solve for x
    x = 2,208,985,864.50/66,513.96
  6. Step 6: Final answer
    x = 33,210.86

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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.