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Finding the Fourth Proportional to 118,104.96, 162,987.92 and 72,812.88

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Solution

The fourth proportional to 118,104.96, 162,987.92 and 72,812.88 is: 100,483.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,104.96 : 162,987.92 = 72,812.88 : x
  2. Step 2: Convert to fraction form
    118,104.96/162,987.92 = 72,812.88/x
  3. Step 3: Cross multiply
    118,104.96x = 162,987.92 × 72,812.88
  4. Step 4: Simplify right side
    118,104.96x = 11,867,619,860.41
  5. Step 5: Solve for x
    x = 11,867,619,860.41/118,104.96
  6. Step 6: Final answer
    x = 100,483.67

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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.