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Finding the Fourth Proportional to 66,208.57, 99,179.88 and 30,620

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Solution

The fourth proportional to 66,208.57, 99,179.88 and 30,620 is: 45,868.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,208.57 : 99,179.88 = 30,620 : x
  2. Step 2: Convert to fraction form
    66,208.57/99,179.88 = 30,620/x
  3. Step 3: Cross multiply
    66,208.57x = 99,179.88 × 30,620
  4. Step 4: Simplify right side
    66,208.57x = 3,036,887,925.60
  5. Step 5: Solve for x
    x = 3,036,887,925.60/66,208.57
  6. Step 6: Final answer
    x = 45,868.50

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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.