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Finding the Fourth Proportional to 118,742.80, 178,229.40 and 59,645.20

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Solution

The fourth proportional to 118,742.80, 178,229.40 and 59,645.20 is: 89,525.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,742.80 : 178,229.40 = 59,645.20 : x
  2. Step 2: Convert to fraction form
    118,742.80/178,229.40 = 59,645.20/x
  3. Step 3: Cross multiply
    118,742.80x = 178,229.40 × 59,645.20
  4. Step 4: Simplify right side
    118,742.80x = 10,630,528,208.88
  5. Step 5: Solve for x
    x = 10,630,528,208.88/118,742.80
  6. Step 6: Final answer
    x = 89,525.67

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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.