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Finding the Fourth Proportional to 67,642.58, 93,384.30 and 40,791.90

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Solution

The fourth proportional to 67,642.58, 93,384.30 and 40,791.90 is: 56,315.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,642.58 : 93,384.30 = 40,791.90 : x
  2. Step 2: Convert to fraction form
    67,642.58/93,384.30 = 40,791.90/x
  3. Step 3: Cross multiply
    67,642.58x = 93,384.30 × 40,791.90
  4. Step 4: Simplify right side
    67,642.58x = 3,809,323,027.17
  5. Step 5: Solve for x
    x = 3,809,323,027.17/67,642.58
  6. Step 6: Final answer
    x = 56,315.46

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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.