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Finding the Fourth Proportional to 123,578.56, 170,539.32 and 66,990.34

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Solution

The fourth proportional to 123,578.56, 170,539.32 and 66,990.34 is: 92,447.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,578.56 : 170,539.32 = 66,990.34 : x
  2. Step 2: Convert to fraction form
    123,578.56/170,539.32 = 66,990.34/x
  3. Step 3: Cross multiply
    123,578.56x = 170,539.32 × 66,990.34
  4. Step 4: Simplify right side
    123,578.56x = 11,424,487,030.17
  5. Step 5: Solve for x
    x = 11,424,487,030.17/123,578.56
  6. Step 6: Final answer
    x = 92,447.16

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1.5x scale

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.