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Finding the Fourth Proportional to 139,440.10, 209,597.55 and 136,815.70

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Solution

The fourth proportional to 139,440.10, 209,597.55 and 136,815.70 is: 205,652.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,440.10 : 209,597.55 = 136,815.70 : x
  2. Step 2: Convert to fraction form
    139,440.10/209,597.55 = 136,815.70/x
  3. Step 3: Cross multiply
    139,440.10x = 209,597.55 × 136,815.70
  4. Step 4: Simplify right side
    139,440.10x = 28,676,235,521.54
  5. Step 5: Solve for x
    x = 28,676,235,521.54/139,440.10
  6. Step 6: Final answer
    x = 205,652.72

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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.