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Finding the Fourth Proportional to 139,069.60, 209,041.80 and 136,445.20

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Solution

The fourth proportional to 139,069.60, 209,041.80 and 136,445.20 is: 205,096.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,069.60 : 209,041.80 = 136,445.20 : x
  2. Step 2: Convert to fraction form
    139,069.60/209,041.80 = 136,445.20/x
  3. Step 3: Cross multiply
    139,069.60x = 209,041.80 × 136,445.20
  4. Step 4: Simplify right side
    139,069.60x = 28,522,750,209.36
  5. Step 5: Solve for x
    x = 28,522,750,209.36/139,069.60
  6. Step 6: Final answer
    x = 205,096.95

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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.