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Finding the Fourth Proportional to 123,564, 170,518.68 and 66,975.60

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Solution

The fourth proportional to 123,564, 170,518.68 and 66,975.60 is: 92,426.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,564 : 170,518.68 = 66,975.60 : x
  2. Step 2: Convert to fraction form
    123,564/170,518.68 = 66,975.60/x
  3. Step 3: Cross multiply
    123,564x = 170,518.68 × 66,975.60
  4. Step 4: Simplify right side
    123,564x = 11,420,590,904.21
  5. Step 5: Solve for x
    x = 11,420,590,904.21/123,564
  6. Step 6: Final answer
    x = 92,426.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.