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Finding the Fourth Proportional to 66,518.60, 99,632.10 and 57,770.60

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Solution

The fourth proportional to 66,518.60, 99,632.10 and 57,770.60 is: 86,529.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,518.60 : 99,632.10 = 57,770.60 : x
  2. Step 2: Convert to fraction form
    66,518.60/99,632.10 = 57,770.60/x
  3. Step 3: Cross multiply
    66,518.60x = 99,632.10 × 57,770.60
  4. Step 4: Simplify right side
    66,518.60x = 5,755,806,196.26
  5. Step 5: Solve for x
    x = 5,755,806,196.26/66,518.60
  6. Step 6: Final answer
    x = 86,529.27

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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.