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Finding the Fourth Proportional to 142,202.80, 213,201.80 and 79,892.40

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Solution

The fourth proportional to 142,202.80, 213,201.80 and 79,892.40 is: 119,781.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,202.80 : 213,201.80 = 79,892.40 : x
  2. Step 2: Convert to fraction form
    142,202.80/213,201.80 = 79,892.40/x
  3. Step 3: Cross multiply
    142,202.80x = 213,201.80 × 79,892.40
  4. Step 4: Simplify right side
    142,202.80x = 17,033,203,486.32
  5. Step 5: Solve for x
    x = 17,033,203,486.32/142,202.80
  6. Step 6: Final answer
    x = 119,781.07

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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.