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Finding the Fourth Proportional to 123,420.95, 170,320.61 and 66,832.32

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Solution

The fourth proportional to 123,420.95, 170,320.61 and 66,832.32 is: 92,228.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,420.95 : 170,320.61 = 66,832.32 : x
  2. Step 2: Convert to fraction form
    123,420.95/170,320.61 = 66,832.32/x
  3. Step 3: Cross multiply
    123,420.95x = 170,320.61 × 66,832.32
  4. Step 4: Simplify right side
    123,420.95x = 11,382,921,175.95
  5. Step 5: Solve for x
    x = 11,382,921,175.95/123,420.95
  6. Step 6: Final answer
    x = 92,228.44

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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.