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Finding the Fourth Proportional to 202,126.40, 303,189.60 and 139,140.80

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Solution

The fourth proportional to 202,126.40, 303,189.60 and 139,140.80 is: 208,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,126.40 : 303,189.60 = 139,140.80 : x
  2. Step 2: Convert to fraction form
    202,126.40/303,189.60 = 139,140.80/x
  3. Step 3: Cross multiply
    202,126.40x = 303,189.60 × 139,140.80
  4. Step 4: Simplify right side
    202,126.40x = 42,186,043,495.68
  5. Step 5: Solve for x
    x = 42,186,043,495.68/202,126.40
  6. Step 6: Final answer
    x = 208,711.20

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1.5x scale

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.