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Finding the Fourth Proportional to 139,652.60, 209,478.90 and 108,510.20

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Solution

The fourth proportional to 139,652.60, 209,478.90 and 108,510.20 is: 162,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,652.60 : 209,478.90 = 108,510.20 : x
  2. Step 2: Convert to fraction form
    139,652.60/209,478.90 = 108,510.20/x
  3. Step 3: Cross multiply
    139,652.60x = 209,478.90 × 108,510.20
  4. Step 4: Simplify right side
    139,652.60x = 22,730,597,334.78
  5. Step 5: Solve for x
    x = 22,730,597,334.78/139,652.60
  6. Step 6: Final answer
    x = 162,765.30

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1.5x scale

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.