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Finding the Fourth Proportional to 93,940.40, 140,929.80 and 31,617.20

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Solution

The fourth proportional to 93,940.40, 140,929.80 and 31,617.20 is: 47,432.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,940.40 : 140,929.80 = 31,617.20 : x
  2. Step 2: Convert to fraction form
    93,940.40/140,929.80 = 31,617.20/x
  3. Step 3: Cross multiply
    93,940.40x = 140,929.80 × 31,617.20
  4. Step 4: Simplify right side
    93,940.40x = 4,455,805,672.56
  5. Step 5: Solve for x
    x = 4,455,805,672.56/93,940.40
  6. Step 6: Final answer
    x = 47,432.26

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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.