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Finding the Fourth Proportional to 74,467.60, 111,700.50 and 21,875.20

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Solution

The fourth proportional to 74,467.60, 111,700.50 and 21,875.20 is: 32,812.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,467.60 : 111,700.50 = 21,875.20 : x
  2. Step 2: Convert to fraction form
    74,467.60/111,700.50 = 21,875.20/x
  3. Step 3: Cross multiply
    74,467.60x = 111,700.50 × 21,875.20
  4. Step 4: Simplify right side
    74,467.60x = 2,443,470,777.60
  5. Step 5: Solve for x
    x = 2,443,470,777.60/74,467.60
  6. Step 6: Final answer
    x = 32,812.54

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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.