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Finding the Fourth Proportional to 111,669.32, 154,041.28 and 68,618.90

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Solution

The fourth proportional to 111,669.32, 154,041.28 and 68,618.90 is: 94,655.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,669.32 : 154,041.28 = 68,618.90 : x
  2. Step 2: Convert to fraction form
    111,669.32/154,041.28 = 68,618.90/x
  3. Step 3: Cross multiply
    111,669.32x = 154,041.28 × 68,618.90
  4. Step 4: Simplify right side
    111,669.32x = 10,570,142,246.44
  5. Step 5: Solve for x
    x = 10,570,142,246.44/111,669.32
  6. Step 6: Final answer
    x = 94,655.75

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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.