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Finding the Fourth Proportional to 67,407.58, 101,107.71 and 20,660.58

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Solution

The fourth proportional to 67,407.58, 101,107.71 and 20,660.58 is: 30,989.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,407.58 : 101,107.71 = 20,660.58 : x
  2. Step 2: Convert to fraction form
    67,407.58/101,107.71 = 20,660.58/x
  3. Step 3: Cross multiply
    67,407.58x = 101,107.71 × 20,660.58
  4. Step 4: Simplify right side
    67,407.58x = 2,088,943,931.07
  5. Step 5: Solve for x
    x = 2,088,943,931.07/67,407.58
  6. Step 6: Final answer
    x = 30,989.75

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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.