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Finding the Fourth Proportional to 111,386.63, 166,820.54 and 66,915.20

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Solution

The fourth proportional to 111,386.63, 166,820.54 and 66,915.20 is: 100,216.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,386.63 : 166,820.54 = 66,915.20 : x
  2. Step 2: Convert to fraction form
    111,386.63/166,820.54 = 66,915.20/x
  3. Step 3: Cross multiply
    111,386.63x = 166,820.54 × 66,915.20
  4. Step 4: Simplify right side
    111,386.63x = 11,162,828,629.53
  5. Step 5: Solve for x
    x = 11,162,828,629.53/111,386.63
  6. Step 6: Final answer
    x = 100,216.96

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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.