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Finding the Fourth Proportional to 202,140.20, 303,210.30 and 139,154.60

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Solution

The fourth proportional to 202,140.20, 303,210.30 and 139,154.60 is: 208,731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,140.20 : 303,210.30 = 139,154.60 : x
  2. Step 2: Convert to fraction form
    202,140.20/303,210.30 = 139,154.60/x
  3. Step 3: Cross multiply
    202,140.20x = 303,210.30 × 139,154.60
  4. Step 4: Simplify right side
    202,140.20x = 42,193,108,012.38
  5. Step 5: Solve for x
    x = 42,193,108,012.38/202,140.20
  6. Step 6: Final answer
    x = 208,731.90

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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.