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Finding the Fourth Proportional to 117,998.76, 162,851.40 and 72,667.80

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Solution

The fourth proportional to 117,998.76, 162,851.40 and 72,667.80 is: 100,289.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,998.76 : 162,851.40 = 72,667.80 : x
  2. Step 2: Convert to fraction form
    117,998.76/162,851.40 = 72,667.80/x
  3. Step 3: Cross multiply
    117,998.76x = 162,851.40 × 72,667.80
  4. Step 4: Simplify right side
    117,998.76x = 11,834,052,964.92
  5. Step 5: Solve for x
    x = 11,834,052,964.92/117,998.76
  6. Step 6: Final answer
    x = 100,289.64

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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.