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Finding the Fourth Proportional to 64,996.80, 89,644.62 and 42,342.93

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Solution

The fourth proportional to 64,996.80, 89,644.62 and 42,342.93 is: 58,400.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,996.80 : 89,644.62 = 42,342.93 : x
  2. Step 2: Convert to fraction form
    64,996.80/89,644.62 = 42,342.93/x
  3. Step 3: Cross multiply
    64,996.80x = 89,644.62 × 42,342.93
  4. Step 4: Simplify right side
    64,996.80x = 3,795,815,869.54
  5. Step 5: Solve for x
    x = 3,795,815,869.54/64,996.80
  6. Step 6: Final answer
    x = 58,400.04

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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.