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Finding the Fourth Proportional to 78,664.59, 117,898.34 and 61,958.63

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Solution

The fourth proportional to 78,664.59, 117,898.34 and 61,958.63 is: 92,860.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,664.59 : 117,898.34 = 61,958.63 : x
  2. Step 2: Convert to fraction form
    78,664.59/117,898.34 = 61,958.63/x
  3. Step 3: Cross multiply
    78,664.59x = 117,898.34 × 61,958.63
  4. Step 4: Simplify right side
    78,664.59x = 7,304,818,726.39
  5. Step 5: Solve for x
    x = 7,304,818,726.39/78,664.59
  6. Step 6: Final answer
    x = 92,860.32

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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.