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Finding the Fourth Proportional to 68,458.80, 94,537.78 and 64,731.30

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Solution

The fourth proportional to 68,458.80, 94,537.78 and 64,731.30 is: 89,390.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,458.80 : 94,537.78 = 64,731.30 : x
  2. Step 2: Convert to fraction form
    68,458.80/94,537.78 = 64,731.30/x
  3. Step 3: Cross multiply
    68,458.80x = 94,537.78 × 64,731.30
  4. Step 4: Simplify right side
    68,458.80x = 6,119,553,398.51
  5. Step 5: Solve for x
    x = 6,119,553,398.51/68,458.80
  6. Step 6: Final answer
    x = 89,390.31

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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.