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Finding the Fourth Proportional to 74,647.44, 103,013.55 and 40,655.98

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Solution

The fourth proportional to 74,647.44, 103,013.55 and 40,655.98 is: 56,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,647.44 : 103,013.55 = 40,655.98 : x
  2. Step 2: Convert to fraction form
    74,647.44/103,013.55 = 40,655.98/x
  3. Step 3: Cross multiply
    74,647.44x = 103,013.55 × 40,655.98
  4. Step 4: Simplify right side
    74,647.44x = 4,188,116,828.53
  5. Step 5: Solve for x
    x = 4,188,116,828.53/74,647.44
  6. Step 6: Final answer
    x = 56,105.30

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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.