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Finding the Fourth Proportional to 117,972, 162,801.36 and 67,687.20

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Solution

The fourth proportional to 117,972, 162,801.36 and 67,687.20 is: 93,408.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,972 : 162,801.36 = 67,687.20 : x
  2. Step 2: Convert to fraction form
    117,972/162,801.36 = 67,687.20/x
  3. Step 3: Cross multiply
    117,972x = 162,801.36 × 67,687.20
  4. Step 4: Simplify right side
    117,972x = 11,019,568,214.59
  5. Step 5: Solve for x
    x = 11,019,568,214.59/117,972
  6. Step 6: Final answer
    x = 93,408.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.