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Finding the Fourth Proportional to 74,915.29, 103,378.53 and 40,916.89

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Solution

The fourth proportional to 74,915.29, 103,378.53 and 40,916.89 is: 56,462.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,915.29 : 103,378.53 = 40,916.89 : x
  2. Step 2: Convert to fraction form
    74,915.29/103,378.53 = 40,916.89/x
  3. Step 3: Cross multiply
    74,915.29x = 103,378.53 × 40,916.89
  4. Step 4: Simplify right side
    74,915.29x = 4,229,927,940.37
  5. Step 5: Solve for x
    x = 4,229,927,940.37/74,915.29
  6. Step 6: Final answer
    x = 56,462.81

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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.