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Finding the Fourth Proportional to 139,746.40, 209,619.60 and 133,622.80

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Solution

The fourth proportional to 139,746.40, 209,619.60 and 133,622.80 is: 200,434.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,746.40 : 209,619.60 = 133,622.80 : x
  2. Step 2: Convert to fraction form
    139,746.40/209,619.60 = 133,622.80/x
  3. Step 3: Cross multiply
    139,746.40x = 209,619.60 × 133,622.80
  4. Step 4: Simplify right side
    139,746.40x = 28,009,957,886.88
  5. Step 5: Solve for x
    x = 28,009,957,886.88/139,746.40
  6. Step 6: Final answer
    x = 200,434.20

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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.