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Finding the Fourth Proportional to 202,141.20, 303,211.80 and 139,155.60

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Solution

The fourth proportional to 202,141.20, 303,211.80 and 139,155.60 is: 208,733.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,141.20 : 303,211.80 = 139,155.60 : x
  2. Step 2: Convert to fraction form
    202,141.20/303,211.80 = 139,155.60/x
  3. Step 3: Cross multiply
    202,141.20x = 303,211.80 × 139,155.60
  4. Step 4: Simplify right side
    202,141.20x = 42,193,619,956.08
  5. Step 5: Solve for x
    x = 42,193,619,956.08/202,141.20
  6. Step 6: Final answer
    x = 208,733.40

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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.