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Finding the Fourth Proportional to 252,140.80, 378,211.20 and 141,318.40

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Solution

The fourth proportional to 252,140.80, 378,211.20 and 141,318.40 is: 211,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,140.80 : 378,211.20 = 141,318.40 : x
  2. Step 2: Convert to fraction form
    252,140.80/378,211.20 = 141,318.40/x
  3. Step 3: Cross multiply
    252,140.80x = 378,211.20 × 141,318.40
  4. Step 4: Simplify right side
    252,140.80x = 53,448,201,646.08
  5. Step 5: Solve for x
    x = 53,448,201,646.08/252,140.80
  6. Step 6: Final answer
    x = 211,977.60

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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.