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Finding the Fourth Proportional to 139,506.07, 209,254.48 and 60,620.30

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Solution

The fourth proportional to 139,506.07, 209,254.48 and 60,620.30 is: 90,928.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,506.07 : 209,254.48 = 60,620.30 : x
  2. Step 2: Convert to fraction form
    139,506.07/209,254.48 = 60,620.30/x
  3. Step 3: Cross multiply
    139,506.07x = 209,254.48 × 60,620.30
  4. Step 4: Simplify right side
    139,506.07x = 12,685,068,855.58
  5. Step 5: Solve for x
    x = 12,685,068,855.58/139,506.07
  6. Step 6: Final answer
    x = 90,928.44

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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.