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Finding the Fourth Proportional to 74,672.80, 103,044.81 and 40,681.06

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Solution

The fourth proportional to 74,672.80, 103,044.81 and 40,681.06 is: 56,137.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,672.80 : 103,044.81 = 40,681.06 : x
  2. Step 2: Convert to fraction form
    74,672.80/103,044.81 = 40,681.06/x
  3. Step 3: Cross multiply
    74,672.80x = 103,044.81 × 40,681.06
  4. Step 4: Simplify right side
    74,672.80x = 4,191,972,098.30
  5. Step 5: Solve for x
    x = 4,191,972,098.30/74,672.80
  6. Step 6: Final answer
    x = 56,137.87

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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.