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Finding the Fourth Proportional to 111,387.63, 166,822.03 and 66,916.20

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Solution

The fourth proportional to 111,387.63, 166,822.03 and 66,916.20 is: 100,218.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,387.63 : 166,822.03 = 66,916.20 : x
  2. Step 2: Convert to fraction form
    111,387.63/166,822.03 = 66,916.20/x
  3. Step 3: Cross multiply
    111,387.63x = 166,822.03 × 66,916.20
  4. Step 4: Simplify right side
    111,387.63x = 11,163,096,323.89
  5. Step 5: Solve for x
    x = 11,163,096,323.89/111,387.63
  6. Step 6: Final answer
    x = 100,218.46

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1.5x scale

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.