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Finding the Fourth Proportional to 68,458.52, 102,643.84 and 28,505.18

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Solution

The fourth proportional to 68,458.52, 102,643.84 and 28,505.18 is: 42,739.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,458.52 : 102,643.84 = 28,505.18 : x
  2. Step 2: Convert to fraction form
    68,458.52/102,643.84 = 28,505.18/x
  3. Step 3: Cross multiply
    68,458.52x = 102,643.84 × 28,505.18
  4. Step 4: Simplify right side
    68,458.52x = 2,925,881,135.09
  5. Step 5: Solve for x
    x = 2,925,881,135.09/68,458.52
  6. Step 6: Final answer
    x = 42,739.47

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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.